It's a nice idea to keep the donations voluntary and anonymous, if the donor wishes so. I also highly appreciate Goss' post about where the money goes - it's really important that everyone knows that.
However, I'm not willing to donate any money to something that is simple and priceless fun to me. I tend to stay away from the material part of creative engagement, because it should be
creative engagement, not material one. Just my opinion, though, and obviously not a very common one, since I already see a lot of people running around with donor medals. XD