I missed some part of the thread but was OP asked to buy BTC using a credit card?
It makes sense to decline when it's something like this which is the reason for them to reach out and ask someone to bet for them after they mistakenly assume OP is a high roller.
However, if they are real, they are also risking a lot of money that they would send to someone anonymous like OP. I wonder how those guys would recover the funds let's say OP withdraws the funds to his wallet. It would be funny to learn he scammed the credit card thief.
No, there was nothing about this, but I assume that this is exactly the scheme there. Do you really know nothing about the scheme when you are offered to bet on a “fixed match” and the commission (payment for your help) is very generous (up to 50%)? Moreover, you won’t even bet your money - the required amount will be transferred to you. The problem is that these coins are stolen and the scammers don’t care how much you pay - if you win, they will receive 50%, but with the white money that you receive from the casino, you will also receive the winnings, but also subsequent problems with the police (you provided your account, which means there will be questions to you). This is money laundering where you are left with dirty money in your hands.