If anything these changes actually make it easier for bots to work and get more money.
I could just create one that votes on every post at 31 minutes - it's easy. This will just penalise regular people.
Bots should be dealt with more directly. One initial step would be giving instant bans for their use (at least for voting).
That's what I was hoping downvoting all these bots would help do, seperate them from humans and take whatever steps necessary to remove the profile and hopefully get some control over the issue.