[Correction]

Here's a suggestion, although I don't know how possible it is or how popular it'd be...

Maybe make the AP fountain save the gralets put into it, and at some interval evenly distribute them among players online, perhaps taking into account their current balance to give more to those who have less. In this sense, buying AP would kindof be like giving to the poor, so it not only makes PKers happy but also helps out newbies.