I've been in dustsweeper for quite a while though I am not as active as I use to be since HF20, I did notice a increase in rewards after signing up with them, something was better than nothing for the time being spent on here that I was doing. Whatever you delegate to dustsweeper they double, when you run out of funds they notify you, because of the growth of the programs popularity I think they went to limiting the number of upvotes per day to two per day...but it may take a day or two to notice the upvote because they've become so busy.