This is a scam where they supposedly offer you a free bonus and say that you can withdraw your winnings after sending a message through their live chat.
When you place a bet on their roulette, you will always win a big amount. Then, if you contact them on the live chat, they will ask you to either send 0.01 BTC or ask you to 'verify' using a credit card.
After you've done this, they just remove your account and you don't receive anything.
Don't fall for this and don't even create an account on this website.
They will use your login data to check whether they can access other websites with that data.
Be careful!
These people are trolling the forum from last few days. Long ago I had this experience...
I found a site, they gave me some free coins to bet. I won some good amount. They then asked me to deposit some fresh coins before withdrawing the money.
I guess these way they verify that one wallet one user LOL (New kind of KYC, user per wallet)
Anyway, good post OP. I hope people the topic gets more exposure.
Good luck.