It sounds like a typical phishing attempt where they don’t even know if the account has a balance or not. I’ve experienced something similar, getting emails claiming I made a withdrawal from my Coinbase account, even though I didn’t have any funds in it. Now imagine someone who does have a balance and clicks the link, opens their account, and unknowingly exposes it, that’s a potential loss on their part.
This casino scam attempt seems similar. If OP didn’t recognize the trick, they might have fallen for it, opened their account, and if there’s a balance, it could be drained. However, I don’t think the casino itself is involved in this, just like Coinbase wasn’t responsible in my case. It’s likely scammers using the casino’s name to target users. So always stay cautious!
It may sound harmless at first but it's a common trick to lure you into putting your login credentials which they will then try in numerous websites in an attempt to get a match. Don't trust any email on your spam folder, unless you actually know the sender, 9 times out of 10, its simply spam or a scam. I've recently started receiving random emails from so-called casinos to claim my bonus spins or my bonus for signing up with them, when in reality, I'm using a few selected casinos, all from this forum.
Indeed, we should not fall for such emails, some may pose a phishing risk or worse and I make sure that I protect my gadgets and assets to the point that even if my most trusted bank or other companies mailed me for a task, I go directly to their web page or platform to avoid possible link threats. But at times too, I have experienced such unfamiliar emails as seen in the OP which I opened deliberately, particularly the unsolicited ones and they appear to be harmless. It is just an ignoble means of aggressive marketing where your data is bought and used to create an account for you. This is a desperate way that is annoying.