Fluctuations 

Your post didn't "lose" esteem, however it might be seen that way. It says potential payout for a reason: it changes minute to minute in light of movement over the whole system. 

Each post has a particular measure of "compensate shares" it gains each time it's voted on. The measure of reward shares is controlled by the quality of the voter. The reward shares are a qualification to a bit of that day's aggregate payouts. 

The breaking points here originated from the way that a set/constrained measure of SP/SBD is produced each day. The more individuals acquiring these reward shares, the more individuals wind up part the aggregate pool of prizes for that era. The post you particularly specify going from 7.4k - 7k isn't on the grounds that your post is losing reward shares, it's that other individuals are winning prize offers, in this manner diminishing your rate of the general pie. 

Votes aren't worth SBD rewards, they are worth "offers" of the general payout pool. Consider it similar to pool mining... the more hashes you produce, the bigger rate of the piece (when found) you'd get. Furthermore, on the off chance that another person begins mining harder than you, the general rate of your commitment diminishes. 

Decentralization 

I'd contend against your "steemit.com isn't decentralized" articulation. You could download the source at the present time and run the site on your PC. Truth be told, I know there are a couple of other sites at the present time running the steemit.com source code, seeing a similar data, and taking an interest in the same blockchain. 

You could close down the servers running steemit.com, yet that wouldn't stop steem. Steem is decentralized, it's running on many servers. It likewise wouldn't stop site's fueled my venture (steempress.io), like jesta.us. That is perusing an indistinguishable blockchain information from steemit.com and taking an interest in all parts of steem. 

It's incredibly decentralized. The main issue at this moment is you're just observing one site, most likely in light of the fact that this venture is just a couple of months old. There are others (like myself) endeavoring to bring new stages into the biological system to additionally decentralize the frameworks. It just requires investment. 

In any case, at last, if steemit.com got closed down, nothing would prevent the substance from engendering on the blockchain, and different sites conforming to it. The genie is out of the container and can't be returned in.

@shanzaylizay