Since you have traffic, you could work on monetizing in other ways than adsense. Think of a product that visitors might be interested in and try to sell them that.
I second this idea. Find out who are your 'power users' for each app. Is there overlap? You can focus on one type of user, find a complementary product that pays for referrals, and link to it at the bottom of each page.
thecolorblue|11 years ago