I also sometimes think the same, how is it possible for a very, very simple image to get a very large payout? But like you said, there are tons of vote boosters out there and we just don't have the strength to fight them.
Solution? Try to keep working until one point you will be disappointed and quit, thus concluding that this is not your place.
I believe if people use bitbots correctly and not exaggerating then it is acceptable :)
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