Sure, you just let me know which accounts (up to 3 if $10 or more is donated) that you want to be on paid status. And it's pretty much a life time of paid status at the moment since I don't have the resources to track it.
Paid accounts should receive 50 codes (that might be 50 codes per month but we'll have to see when 1 month comes around (to see if the code that generates them is setup properly).
I did think about Google Adsense. I agree about big flashy banner, blech!
Let me know if you have any other questions.