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Yes, because using BidBots help you get exposure of your content and if people like it you will get organic votes and followers. It depends what you use the bidbots for. If you promote something that breaks Steemit rules/SPAM people will flag you and you will end up losing money.

and in the process it makes the bot owners richer

win and win situation, they are providing a service, they have to get richer in the process. That is how life works.