Just found the ChipIn module on your frontpage that says that you need $100 a month...
well, why?
even heavily visited gameservers with over 10TB traffic a month cost less (80-90$)

That's why I'm asking because 10-20$ seems more natural to me.
(as comparison for just a hostingprovider that offers quite alot: http://servage.net/ for just ~8EUR a month)