Check out the
donate link. The $10 and $25 monthly subscriptions are the best because then I know how much is coming each month, or you can send any one-time amount. $1 or $100, literally every cent counts.
The server is $170 each month, though there are other expenses along the way. So far we've received about $100 in donations this cycle, which is great, but there's always room for more. We've never come out with a surplus, though it's no problem if we do as we'll just carry the funds over to the next bill.
So the answer is... however much you want. Nothing's too small or too large. We'll use everything we get, or deal with it if we don't get much. Thanks again!