There are current reworks n progress for this too. Currently we have been giving out 2000 credits for each donor but we hope to add some new and useful features in the future. I don't know how much of what is in the works should remain private so I won't discuss any of it yet but hopefully soon we get some cool features out.
One thing I want to make especially clear is that money from donations never even touches Untitled's pockets, when you donate it just adds funds to his account with the host for most of the servers. Every penny given goes directly towards server upkeep. If more money is raised VIA donations than required to keep the servers up (this is not a small amount either) then excess will be applied towards next months bills.