The Steemit Promote Feature!
Before the existence of Bidbots, one way to boost a posts visibility is by using The Steemit Promote Feature. However unlike bidbots, the SBD/STEEM being used to promote the post is being BURNED. Steemit does this by sending the liquid Steem to the account @null which is Steem's version of burning.
This is clearly not a good way to do post promotion. One could spend 20 SBD to increase the visibility of a post and 7 days later only get less than $5. Why? Because no one bothers to read Promoted Tab anymore. And even if some indeed read posts there, they are not likely to upvote just because.
So in the end, that someone will lose 20SBD and probably have gained nothing which is very unlike bidbots since you get around -10% to +10% profit everytime you use a bidbot. This is what Steem/Steemit is doing wrong. A way to promote blog posts that will benefit both sides!