coefficients are made in such way that sum of losses is always greater than sum of wins. That's why site doesn't lose money.
The rest of the explanations were moot, this was the point. Suspicions confirmed.
Oh damn, and here I was thinking this was a charity site! Thanks for making me aware of that!
You're not very smart, are you?

You can easily calculate the expected returns yourself using 80% chance to succeed for any move. Of course
it is always negative. It's a gambling site!
Nothing of that has anything to do with your claim, which is clearly wrong:
the free version is always easier than when you put money down
Sounds like you are just angry you lost some money on this ^_^