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It has been a collective conclusion that 1xbet hold more aura of being a legitimate service than 1xbit does, and I have my personal theories on it. I agree with you, there must be some selective gambling scams happening there as well, but they cannot be as blatant as their little bother 1xbit is, because they deal with Fiat and other third party payment processors, instead of cryptocurrency, so it would be easier for them to be held onto account if ever caught red-handed trying to scam a lot of people at the same time.
Despite of that sense of legitimacy and the invasive advertisement campaigns they keep up, it is important for us to continue to earn other gamblers (even Fiat gamblers) not to deposit their money on neither of those websites and show examples of selective scams to them, if necessary.
I actually was once a loyal player on 1xbet, since the casinos is one of the most popular online gambling casino here in my country, and they accept direct deposit and withdrawal of my local currency, so, I made this casino my go to when ever I wanted to gamble using my local currency.
I sure never encountered any issues, not with deposits or withdrawals, I played on this casino for not less than eight months before I decided to withdraw all my funds from them and quit playing there, and this due to the fact that I've seen a lot of other users complain about being scammed, like when they win a big amount of money, the casino will either ask for kyc verification by requesting a document they know they user can't provide, or they simply will accuse the user of cheating and immediately block the user, this gave me the impression that they (indeed) were selectively scamming users, and in a manner it doest really affect their reputation.
So yeah, advising as many that will care to listen; to avoid 1xbit and 1xbet casinos.