I think I'm ambivalent about the bots. I tried one a couple of times. I may even have inhaled...
So bots exist. And the platform encourages it. These bots generally fill up their maximum profitable votes before they execute their upvotes ever 2.4 hours.
If it's immoral on the grounds that it uses money from the reward pool that could go to quality content... then is it immoral to then make use of the bots to upvote quality content?
And to play devil's advocate:
If enough people did this, it would, presumably, prevent people from using the bots to just upvote garbage. Wouldn't it then become a moral obligation to attempt to do this as much as possible?