why they are a scam?
https://latestcasinobonuses.com/casinos/bitcoincasino Quote
Blacklisted - No license, player complaints, customer support is rude, and the rep had the cheek to private message LCB members offering them a free chip for signing up directly with their website instead of LCB's. Members were also asked to rate and review the casino.
https://www.scambitcoin.com/bitcoincasino-us/
Quote
Bitcoin Casino tends to imply that their platform is the most fair virtual gambling site currently available to U.S. consumers. While we could find no reference on their site in regards to a users probability of winning, it certainly raises some red flags regarding whether or not BitcoinCasino.us is actually fair or not.
You can also find lots of complain from players in comment section too.