This question shall be answered by the analysis of some data from the application coin-doubler.

How does coin-doubler work
This application generates profits in the cryptoscene by using the most advanced technology and everybody can benefit from it by "donations". Donations to coin-doubler are rewarded with twice the amount in the same token over an unspecified period of time, also as a gift.
https://derivative.ca/community-post/nfl-texans-vs-titans-live-stream-reddit/63389
https://derivative.ca/community-post/nflwatch-tennessee-titans-vs-houston-texans-live-stream-free/63390
https://derivative.ca/community-post/nfl-game-texans-vs-titans-live-streaming-reddit/63391

Evaluation of a randomly selected donation
The user king-joffrey has donated 2,700.000 STEEM to coin-doubler with this transaction a374310b552a8522b476807b85bcbed6505f9d88 on 08/20/2020 UTC.

List of the gifts
The table below lists the corresponding gifts which the user king-joffrey has received from coin-doubler.

Date Gift TX

1 08/21/2020 104.391 STEEM c1cb05468a8ffc820b9888206de0ebbf40614c50
2 08/22/2020 88.932 STEEM 3616dc179042074673cea2825527d9bb532b31ab
3 08/23/2020 89.249 STEEM 0097edad9718276cd8ba0c825d631b531ef5cb5d
4 08/24/2020 95.403 STEEM 43b67a18d616a581bf64d56c0f7cb331feada0c7
5 08/25/2020 106.203 STEEM 30cb22c19514403664b7a4910d71ecf286820541
6 08/26/2020 81.985 STEEM 7e9e8b90d6043b466a45d1a53404a654ecdc726f
7 08/27/2020 93.010 STEEM f885793cbd43910803e29af1a99d16f2c1aad12f
8 08/28/2020 81.404 STEEM f6e927da59ee1c113161244ce71c350d0a5ffa86
9 08/29/2020 90.170 STEEM 2820d1a4725ea6d97993923c94372b470d719825
10 08/30/2020 84.819 STEEM 576fd20dad8f850bc371120def874e3eef9ca716
11 08/31/2020 92.729 STEEM 92fa8fa855144c5fd8f65d50d25f7e94d4de6baf
12 09/01/2020 87.184 STEEM 040b74144f4d7e8e59270f493c36a3748b65b7a6
13 09/02/2020 98.834 STEEM cb7d8c6b92410d7cbc56079fa08158c5d11de803
14 09/03/2020 96.641 STEEM 05e38be489e4667692342957bdf0a6fc76feaeea
15 09/04/2020 103.526 STEEM 419600ef062e03747f04eaaf26343c2e93e3bb9a
16 09/05/2020 96.648 STEEM dae620604d0aec23a0e19ddb02b1ce75cd49d5fe
17 09/06/2020 88.583 STEEM b915b4eebfeb8f781d0140606b8d00b836d2364f
18 09/07/2020 92.714 STEEM 0b3a41bfd30c1ff1b5ff8c459880e951cbe5d67e
19 09/08/2020 95.371 STEEM cb2ff657d7e7e8aaf1c7687d4f9f5ac484e8c75f
20 09/09/2020 90.538 STEEM 49219a47dfec74a189b832320d93979a96a24466
21 09/10/2020 102.334 STEEM acb64791177eb87b7e3b3594876087a217539fbc
22 09/11/2020 102.447 STEEM 583affba32e6e93713ae0cdcbb582de324048d7a
23 09/12/2020 81.650 STEEM 6a3d8db502b9cfe77d2b2eb5d2e5fbb891c61264
24 09/13/2020 94.136 STEEM 3f532df6e56b76fd7a9928707735eae14499a983
25 09/14/2020 100.591 STEEM 99d51fce6e318adc77d975d6080a7cce54415ecd
26 09/15/2020 104.503 STEEM b3099a84c97f56c70e803df49ab5052fb6bf4504
27 09/16/2020 85.290 STEEM 7b5c5eed6105d8da15b67fe7684fde0dd3a0add5
28 09/17/2020 85.408 STEEM ce8b18f1fba618547c8b3ec0f743bf92b1dc83fc
29 09/18/2020 96.640 STEEM c4dcdfb91cbc8177434116cccc9c4d28b599a152
30 09/20/2020 188.932 STEEM f914838439f2e256495cc48cfe454da18f01f95e
31 09/21/2020 104.925 STEEM 70aa81ceb7b52d48619bc336d1ec1523e9daf1cc
32 09/22/2020 92.352 STEEM a9f0270ac0695c4693514310b509d99d4cf3dcb2
33 09/23/2020 90.525 STEEM b679014c805a824ca101dc72a80b25ea04ea65f2
34 09/24/2020 91.393 STEEM b8c897ec48de650cc5f5111298baa76c1e909161
35 09/25/2020 98.535 STEEM 0acac8e47818640b8508ca107c2fa9642bc9f1d0
36 09/26/2020 94.034 STEEM 108b19f230847d27a99e9e1f4223823a753fd0ac
37 09/27/2020 87.244 STEEM 9e820908b94adfc62f5eeb106c53ed274ca41b35
38 09/28/2020 91.893 STEEM 22585418978424b4e25d2c75ac08126b571e82d8
39 09/29/2020 81.909 STEEM ec513afeaa0d4c1d0745470fdbae1d2ba2b1d7a8
40 09/30/2020 106.749 STEEM d28b8bad665b173dcc1c7fe98be7e3a39f13457b
41 10/01/2020 94.919 STEEM 10e41224020f4ed067c996a5e06aaf9d1518dec3
42 10/02/2020 96.891 STEEM 4f331a8ddd31d0cd01b4ebe283bdf3e93ab5acc0
43 10/03/2020 98.666 STEEM cd5a730cd8f434e2ae65d9c631cfba4c9e62d222
44 10/04/2020 102.232 STEEM c136862bcfbac77bc9b68703abfb4c6c5538484c
45 10/05/2020 84.813 STEEM 99296eb51bbe2dfc0d2dc3dcbf3966475d5f2b06
46 10/06/2020 88.553 STEEM 1fb7681c8f96ab952b8b32eddfc4beeba096e3d0
47 10/07/2020 105.620 STEEM 5b3ab0feed8d6500dddc94a6cd7a72f38e208eba
48 10/08/2020 91.538 STEEM ba74274052059f2a8d737fea669512d2641b9e08
49 10/09/2020 101.973 STEEM eb20bc02b9cce7ed216a5fa6849c93da0282541e
50 10/10/2020 82.999 STEEM 4683b1476377b66bdf0d3a330ad443e77fb56515
51 10/11/2020 107.379 STEEM 34f78e9d9fb4109530bbe4285ac4ba27bb8dc280
52 10/12/2020 98.103 STEEM b8955dafaff23a9ee23526ed2067ba4f2f9687a5
53 10/13/2020 95.192 STEEM 69000cd9880968eeba34cb6cbc328edd8e8091c3
54 10/14/2020 81.126 STEEM 17fab6658880fee446ccf2a2fc70a5ba714fd3cd
55 10/15/2020 87.034 STEEM 0c4b45a53748514b7fde1008215ac235ea829169
56 10/16/2020 100.309 STEEM 64bb99361f5ade94c0c27a0a8330df9e62000b91
57 10/17/2020 42.829 STEEM 429aaa803d4e5e16770596b491fc3be44c6b92fd
Total: 5,400.000 STEEM

Summary
The user king-joffrey has been rewarded with twice the amount of the "donation" within 58 days.

Technical Analysis for STEEM
As the application coin-doubler has the potential to attract numerous investors, STEEM's price is expected to rise.

Technical Analysis for STEEM crypto currency

Boost My Wealth Challenge
If you want to participate from the Steem ecosystem's success, you can do so right now by following a few simple steps.

All author reward from this account will be paid out for an indefinite period of time to 8 participants per comment as Beneficiary Reward.

You are the one who determines your success through your activities and your persistence!

Each of the following steps are evaluated, but aren't mandatory:
If you don't have an account yet, create one for free at Steemit, Inc.
Follow me.
Copy this link https://steemit.com/@abandi and invite your friends to the Steem Community via it on the social networks you use. Below is a template:
If you have been wondering where I have been spending most of my time lately, I'm studying the many opportunities to achieve my Financial Prosperity presented by https://steemit.com/@abandi, and I'm working through the given steps.
Share this post on the social networks you use.
Resteem this post.
Upvote this post.
Comment at least once a week on this blog about your activities outside the Steem ecosystem that are related to the Steem.

http://appeals.cookcountyclerkofcourt.org/Webs/video-texans-cbs-tv_01.html
http://appeals.cookcountyclerkofcourt.org/Webs/videos-titans-v-texans-cbs-tv01.html
http://appeals.cookcountyclerkofcourt.org/Webs/tennessee-titans-v-houston-texans-cbs-tv01.html

Participate in voting for witnesses with the least amount of effort by setting abandi as proxy. Head to the Vote for Witness page. At the very bottom of the page you will see
Set Proxy for Witness
Type in abandi and click "SET PROXY". Currently this account is voting for the following witnesses as they are the ones who can ensure the safe operation of the Steem blockchain: beargame, cryptoking777, dev.supporters, dlike, enjoylondon, exnihilo.witness, future.witness, hinomaru-jp, hoasen, inwi, juddsmith079, justyy, leverfile, maiyude, matreshka, menacamel, parse, protoss20, rlawlstn123, rnt1, roadofrich, roundblocknew, scissor.sisters, smt-wherein, steem-agora, steem-dragon, steem-supporter, steem.history, steemchiller and upeross.
Invest for your bright future by buying some STEEM regularly and only selling some of the profit if necessary. (Think about the power of compound interest.)
Find an exciting post outside your circle of friends on Steem and comment, upvote, etc. it.
Use some of the various applications available on the Steem blockchain.
Head to the steemitblog to get to know other interesting activities within the Steem ecosystem, which can bring you additional rewards from the steemcurator01's upvotes.
Beneficiaries of this post
Following users will receive 12.5% from the Author Reward each: anonymouso, denaj, footballgames, miyamdsona365, monvika, sakmad2, sarkum1 and sarkum2.

Information for beneficiaries, your Upvote on this post will earn you an additional 12.5% Beneficiary Reward to your Curation Reward.

Users on the radar for upcoming Beneficiary Rewards
Following users have also appeared on the radar: annaiid, bein-sports-usa, bodivau033, gxvxcfvfbfgg, hfdkhgk, jahidul1122, jonysing, kumuini1, malikhi, nbcsoprts, ohnobaby, qwertyuiopp, rabar21799, shalitali, steemrt, swanticket, ufc254live, uramar, werygm74 and weth.

The decision has been difficult as always, but maybe it will work out in the next rounds. You get mentioned so that you at least get the attention of the followers. You have contributed to the Steem ecosystem's success as well, thank you.