Just a suggestion, you may get more people to donate if you were to offer perks for donating, as well as the memorobilia icon.
Some ideas:
1) Ability to earn 400 bucks a day instead of 300. 2) Can upload 5 screens at once instead of 3 3) more chance of submitted pictures being accepted (obviously still bound by normal quality rules)
These are just ideas, Im sure you can think of something better but its just to show the point.
It doesnt matter to me, I have donated already, and will continue to donate to this great site regardless of any changes because I love it so much. But its a system I know has worked well on other sites I belong to, and it may help you attract more donations!