The mining process for most average users with only one average CPU and one average GPU was profitable only few hours (e.g. 0 h to 12 h) after the genesis  block was formed. During this short period they can mined several hundreds to several thousands of ETN after the “ETN-big-bang”. As the time goes on, the difficulty rises, and only miners that mine with several GPUs/CPUs remains in the game. At the moment, an average users/miner with hash power of 200 H/s can mine only about 40 ETN/day.