Hope that people see this comment!
I see the following reasons why someone would not want to use the @dustsweeper service:
- They earn so much from upvotes that they simply have decided to ignore rewards less than $0.02.
- They want to help the Hive blockchain by intentionally and voluntarily allowing the rewards to become dust.
- They think that paying someone else to upvote their posts is "unfair" and is "cheating the system".
- They don't trust @dustsweeper (but why?).