Their site is been proved provably fair and I dont think that they are cheat for your 0.1 btc or any amount that you spent. They been here since 2013 if I not mistaken and I do not think they will ruin people trust just by scamming your low amount of money there. I admit it that they have huge house edge but still it is provably fair
Yes they are provably fair. Freebitco.in is mainly a bitcoin faucet. But after playing free hourly role they gives a pop-up message like that
"You can multiply your bitcoins up to 4,750 times and win free lottery tickets and reward points by playing our provably fair HI-LO game!" Seeing the message new user try their gambling system.
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.