1. If I have X coins, and get 0% back from the mixer, there is no long run...

2. If I have X coins, and the first time I use the mixer I get, let's say, 50% back, and the next time 150%, I end up with 0.75X and so on...
   So, because there are no coins leaving the game, most of the time I will get more than 100% from the mixer (just to be pair).
   Am I right/wrong?