What happens after you collect all the personal prizes?

datasurgeon wrote:
Nor I but I hear it is currently limited to 10 coins extra

And then what? They have been pretty good (ever since the first Halloween) about not letting people collect a bunch of extra limited-time currency without giving some kind of pay off at some time, either donuts/reindeer (last Christmas) or the hearts grinder (last Valentine's Day) or the donut converstion last Halloween. I don't think they'd just let people collect tens of thousands of gift cards without some kind of payout for them.