I could maybe see this if we were able to purchase coins on steam (or the store of the platform you are playing on). They do have to maintain their servers and that costs money. But you can't buy them on Steam and I assume the other platform stores. So what's the purpose of this? If it's to get ready, then do it when coins are available for purchase. Until then drop the stupid fee.
I could also see it if we were able to transfer coins to another player, but we can't even do that. Not that I want to, I don't. But there is no logical purpose for surcharges this at this time.
And as for donating to a society, The President can't draw any of those coins to his personal funds.