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Actually, I think there's some doubt that these bots ARE profitable.

Are you saying you don't think it's profitable to operate one of these bots? Or profitable to buy a vote from one?

I am not convinced it is profitable to employ one.

Yep, completely agree! If it's profitable, people will use them.

If the community agrees with me, they have to make sure it's not profitable for people who use these services. I don't have the voting power to flag every post that these accounts upvote, but what I can do is refuse to upvote any post that has already been upvoted by one of these accounts.