I can't and should never be possible to get auto profit by using them.

Maybe I'm missing something, but the ROI after curation rewards on the larger bots is almost always slightly negative these days...so as far as i can tell most of the time people are not profiting directly from the bot's vote, but rather from the increased visibility, which is exactly as it should be in my opinion.

Vote selling is a market just like anything else. If people can get instant profits from bot votes then that just means it's an inefficient market. That's exactly one of the problems I aimed to solve with the bot tracker website and as I mentioned above it seems to be working most of the time.