Originally Posted by Kotono

It wouldn't really cost anything for people like me that have hundreds of these things saved up. So far I've spent a whopping $2 on this event, and I'll be able to get everything with that, aside from the gacha units. But I don't really consider those to be event units anyway.

Doesn't the Peronamin expire after a while?
Welp I'll just wait till weekend and see how far I come, maybe I'll spend a bit :S