Today I found about an upvote/follow exchange service at SteemFollower made by @mahdiyari.
To my understanding, this service is special because it doesn't matter if you have low Steem Power, all upvotes can be powered up to 100%
There are over 1500 registered users so far. Its based on help and get help back. So the more user that register the more rewards we get.
Each registered user receive 5% of his referrals upvotes.
I Just registered there and I think it is legitimate. If you wish to try it out for yourself, then please use my Referral Link to sign up there:
https://steemfollower.com/?r=1774
Many thanks to you for your support and
Loads of thanks to @mahdiyari, for making this service.