RES is entirely free - as in beer, as in open source, as in everything. If you like our work, a contribution would be greatly appreciated.
When you contribute, you make it possible for the team to cover hosting costs and other expenses so that we can focus on doing what we do best: making your Reddit experience even better.
Listen to some books and help out the RES Developers while you're at it - try out Audible!
RES is available on Github if you'd like to crack it open and help out!