At first they won little btc at multiply game and become addicted to it. Then they started losing their btc and deposit there and loss more btc in multiply game.
When they understand that they have loss huge btc this is too late.
This thing also happened with me.
You said that they don't cheat with my .1 btc. But remember that there are more then 4 million user in this faucet. If 1 million user loss .1 btc than calculate that it's totally huge amount. I also heard that a user lose more then 8 bitcoin in a day and that is true. Actually they don't cheat with us, they are making us fool.
You should remembered that this .092 btc loss is nothing to them but it's a big loss for me at my position.