The service is GAMBLING. GAMBLING is risky.
Keeping my 10 BTC is STEALING. STEALING is wrong.
Sending $9,000 to a random gambling site without reading the rules is stupid. Blaming others is childish.
Stealing is going in the night while you sleep and breaking into a safe.
This is you gouging out your eyes and running into a casino and slapping down $9,000 on a roullete machine and then demanding your money back because you didn't know how it worked.