I really like @booster. I would consider myself one of the few that truely understand how to work with it. But saying to bid high to make the most out of it is counter-productive. In fact, that has made the service a little bit disappointing recently to me because pretty much every round I observed was going OVER the point that still is profitable. Currently people often make losses because too many bid too high. If everyone would bid less than everyone would make a profit. But that would reduce the profit of the @booster owners. So I clearly see a conflict of interest here.

Best example of how things can go wrong is the comment from @blueorgy in this very same post:

I suggest you test out the service very carefully and don't just throw your money at it. Observe all the current bids and use the http://steem.cool/booster/ tool. Then you have good chances to make a profit. Steem on!