I think one of the things about the dust vote that seems to be missing, is that when a person gives a vote, it is an act of curation. If that vote gets dusted, then not only the receiver of that vote misses his/hers reward, but the giver misses out on a chance of a curation reward. So while @dustsweeper may primarily be about the reward going through to the receiver, the caster also gets a reward out of it now also, at least I think that is how it will work, but not 100% sure.