http://catsarch.i2p/supporting
Compared to several other providers I looked at that have hard bandwidth caps or a "pay as you go" system, this was perfect since I regularly use a ton of data a month. For example, at the time of writing this I had used about 24TB on the US server in a 5 day period. Compared to something like Hetzner that has a 20TB (only 1TB in the US) monthly cap where you pay for any over the cap, this works amazingly.