At $30 CPM, that sounds pretty amazing already. My guess is that you could only make more by selling things directly on the site. Baby products are quite a profitable niche, so you might be able to tie up as an affiliate with some online stores. Check out this Mixergy interview of Trevor Ginn, who started Hello Baby (http://www.hellobabydirect.co.uk/) and seems to be doing quite well - http://mixergy.com/trevor-ginn-interview.