I have donated to your cause by purchasing one of your fancy "packs".

I don't know how it will be tied to my actual game account, as game and shop registrations are entirely different things right now.

Will it be some kind of KEY that we enter later, in the game somehow? How will it work for folks that are new to the game and don't have characters yet?

Right now it seems pretty nebulous, and it would probably be smart to explain EXACTLY how it is going to work - when money is involved.