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Steem indeed is the ONLY crypto where you 100% understand why you buy it.
Bots are the application where you could actually spend your crypto and enjoy the service they provide.

But is this healthy? I am not so sure.

If they are used to promote quality content they are a good thing in my opinion.
But I see the worst content upvoted for more than 50 SBD. I think the bot owners have a responsibility together to keep Steemit as clean as possible from these content farmers.

But if we can tackle that problem I think paid upvoting is a good thing and makes Steemit into a functional economy for quality content.