something like a week of playtime, maybe 72 hours? same as the game time tokens, except as play time? I do like the playtime concept, but I also think you need to explain things FAR more extensively on the shop page. It is not clear until you hunt posts down what the two terms mean, and it's not clear if you can play multiple accounts in old haven or if it's just the one you verified and... yeah just... two many questions to even go over them all. Work on your clarity, and your TCoS, it's very digestible right now, but not super sound.
Your selling a product now guys, not just asking for donations anymore.