Yeah. The client only allows you to run one instance at a time, but there is a cracked version that removes that limit. It's not against their TOS or anything, and they still pay you regardless. The server should be able to run around 70 instances, and if you add that to the 70 instances my main rig runs (when I'm sleeping/at school, 40 instances when in use), and 30 instances on my secondary rig (24/7) that should max at least 2 accounts per month ($45 is the monthly limit per account). So it'll pay for itself within a couple of months. Eventually I'll have a whole fleet of servers running the peer lol.
I've only been doing it for about a month and a half. I've earned $45 so far since that's the maximum. The only catch is that you don't get paid until your account is becomes active, in order to do that you just have to run the peer. it can take hours, days, or weeks to get your account activated, it's somewhat random. i suggest running as many instances as possible to increase your chances of getting activated.