I get that this is "normal" in sports betting, but to me (as someone who doesn't use it), it sounds shady. The house edge should be enough to cover the casino's profit, and allowing winning users lower bets than losing users doesn't seem fair.
I don't think fair has anything to do with it. Life isn't fair. Limiting and restricting winning players is something that traditional fiat bookies do as well simply because they like taking your money, not giving it to you. That's not fair, I don't like it, and I don't agree with it. It's still happening though. It's their business and their rules sadly.
Closing the account: sure!
Keeping the deposit: from what I've read here, I don't think that's justified.
Maybe OP isn't telling us the whole story. Remember the Razer admin (or whatever his name is) saying something like
thanks for depositing part of the money back to us. OP could have been doing this for longer than he cares to admit. I am just speculating of course.
I don't think so:
They could have easily added it to the above list: "We reserve the right to disable accounts that have been created with the intention to abuse our bonus, coupon and chat features, or circumvent account limits.
It would be clearer, sure. I still see it as an abusive way to try to get around betting restrictions the provider set on your account and you as a person. The first account got limited. The reasons why don't matter. Just that it did. OP noticed it, so he created a new account to bet more than he could with his first account. How is that not abuse or attempted abuse? Imagine there is a raffle on the forum. It's available for everyone except legendary members and their alts. So to participate in that raffle, you enroll your Loyce mobile account. Didn't you try to cheat and abuse the system by doing that?
What's the difference between OP creating a new account and betting $10,000 on a certain game, or me doing the exact same thing?
I am not sure what you mean. If you both have limited accounts that you are aware of and you registered new accounts to circumvent those restrictions, you have both attempted to cheat and use your accounts in "nefarious" ways. If you didn't have a previous limited account or attempted to wager above a maximum allowed betting amount, then you are good to go.