Thank you :) We were profitable almost right away as long as we were not working on it full time. It wasn't until we were generating 20-30 million impressions

Thank you :) We were profitable almost right away as long as we were not working on it full time. It wasn't until we were generating 20-30 million impressions monthly that we were able to quit our day jobs. The service is free and monetized through AdSense - although we have just introduced a virtual currency as an experiment.