They do a reported 750k (Australian) per day in revenue which is ridiculous. Like it purely because it reminds me of age of empires which I used to love growing up. Also don't need to spend more than a couple of minutes a day playing it.
Is always avoided it cause I hate the ads everywhere. Just downloaded it though, doesn't seem too bad.
I used to play, but got sick of slow progress of the game, however now i play Clash of Gangs.. much better than COC