I dare to say 100% of the bidbots are not profitable. In order to be you need a vote 225% larger than your bid. Take a look at this tool. Go to details for the last rounds and see for yourself.

For more information I dedicated some articles, going from Hype to disbelief, now I know how they work and I do not use them at all.

Check; https://steemit.com/steemit/@santana33/steem-robots-stop-losing-money-and-how-to-be-a-pro

I will write another post on this matter, besides if you want support SmartSteem.