I am dreaming of the day when I can do it for myself. I understand that when I have about $300 worth of Steem Power, my account will be large enough so that my votes are worth $0.02 and I can sweep my own dust.
At that time, I tend to bid farewell to @dustsweeper ; So, maybe you might have a graduation ceremony for people when they reach that magic moment when their Steem Power is sufficient for manual sweeping.
Graduation party would be something. :)
But even if you are above that $300 level, you might be interested to vote with a smaller percentage, like 5%. That way you can still show appreciation and can vote on 20 times so many users.
So Dusty could still be interesting for those with more SP.