The self serve platform has been around for a couple of years now and although I'm not well versed in advertising (so I could be way off the mark) from what I understand a CPM of ~$0.10 isn't particularly good for the publisher (but great for advertisers?) and with the recent talks from Yishan about reddit losing money I guess the self serve platform isn't going to be what rescues them (especially with their big focus on reddit gold?).
Here's a screenshot from the self serve control panel: http://i.imgur.com/QaevQ.png