enough is a very relative term ;)

@dustbunny will raise the priority of your dust on its task-list according to the delegation you are giving to the cause. The collective SP behind @dustbunny's vote is used to fluff up as much dust on the task-list as possible using a min-maxing strategy.

Think of it as everyone putting in as much as they want to afford so that the bunny can try serving everyone as fairly as possible according to dust-demand and support.

The mechanism of delegation based priority bonus and usage based quota offsets is explained in much more detail in THIS POST.