I think that is the biggest misconception of people that if they use bidbots they would earn more than what they put in.
Just doesn't make sense why they would think of that because bid bots are tools for you to increase your visibility not just in the trending page but on certain tags as well. I rarely go to the main trending page but I do check the trending on certain tags I like for example philosophy and psychology to motivation tags. I look at both trending and new and this is how I find new people to follow and if they make consistent good content then I add them to my Ginabot notifications.

I use bots and I know fully well what I am getting myself into and know that I will be getting some of the SBD back but not profiting if I don't get additional high votes after, I'll get some SP and also some followers.
So far I have not lost any money yet and although my profit margins are not that high about 3-10% for me it is not a reason for me to advocate against it.

It provides movement of transactions and the more it is used the better it is for the coin.