This comment is a bit off topic as the post isn't about Clay.io, rather games in general. However, to answer your question, we take a 20% cut on any transactio

This comment is a bit off topic as the post isn't about Clay.io, rather games in general. However, to answer your question, we take a 20% cut on any transactions made through selling games or our in-game payments API. If you're using our Advertising API we take 10-30% (depending on where the game is being played). Everything else (leaderboards, achievements, etc...) is free to use. This info is displayed here: http://clay.io/docs http://clay.io/docs