I think that there is a growing movement of people that are against the bots and those who use them to reach trending. All it will take is enough flags against those using/abusing bots to reach trending and the loss of hundreds of SBD for them to quit using these "services".

To keep people from using the bots you are seeing many steemians putting out some interesting information about the math behind them and how much of the reward pool is being captured by the bots and those who delegate to the bots.

We are also starting to see some people make a push to remove all witness votes to anyone that delegates to a bot to. If enough people do this the lost income from being a top witness might make them realize that earning from bots isn't worth it.

Either way there seems to be a growing backlash towards bot owners and those who delegate to them.