RE: Don't use vote-selling bots: use @promoted instead. A bot that upvotes you when you burn money!
Bots feel like a symptom to a greater problem.
That problem, in my opinion, is 'How do I get my content noticed?'
If Steemit could solve that problem independently, than we wouldn't need the bots to buoy up content by whoring out Steem Power.
Content discovery on Steemit is poor at best and non-existent at worst, which means every post has a very tiny window of effectiveness. Knowing that, many users boost themselves with bots.
Fix content discovery, and the bots will be less useful.