If I may help answering this issue as I think I am quite familiar with this one, as I had a discussion about this topic once, they're referring about the web3 sign-in/sign-up [see image below], where you use your eos wallet as your ID and connect that wallet to their platform, thus accessing the fund directly from your wallet and they're not in custody of any fund.
They also offers "traditional" registration with email, of which you can deposit the fund to your account. Since your fund are in their custody, and for the lack of knowledge of this web-3 alternative registration, I assume you're having a traditional account one.
Interesting. I just signed up with an Eos wallet there to see how it works (ya.. now they can claim I multi-accounted). So had I done that from the start they wouldn't have been able to steal my funds? Funny how they try to suck and blow at the same time "we'll confiscate your funds" coupled with "instant/self custody withdrawals"
They still have a lot of explaining to do when it comes providing proof I did something wrong, tried to circumvent limits or gained any other type of advantage. And I'd love to hear how they can stand by their absurd card counting claim.