Found this little nugget embedded within a VentureBeat article relating to the Facebook Application KissMe:
“[KissMe has] almost become a self-sustaining Facebook app business, already. It has 36,916 daily active users (an impressive 38 percent of the total users), and is running Facebook ads. A rule of thumb is that an app with at least 50,000 daily active users will make enough on advertising to pay for the developers’ room, board and servers.â€�
I wonder why they are using Facebook ads to monetize, rather than socialmedia.com which pays on installs?
What is really cool here though, is the fact that students built this application as part of a class being offered at Stanford University.