AFAIK SBI is not trading votes. The people using SBI are supporting each-other by sponsoring them. And now @mmmmkkkk311 is also sponsored, so he should start downvoting himself too.
He is doing a disservice to Steem though. One can not just stop getting upvotes from SBI, and while he spams us with neverending downvotes it will make the notifications fill up with his bullshit downvotes thus making notifications unusable.
Maybe he just lost it because his investments in SP are not making him rich. He's just like the other guy who used to bully others on Steem for no good reason.
RE: Upvotebuilders Is Closing Down