Linking wallets is a mode of fraud that has been circulating a lot, but of course this is very valuable knowledge for beginners. I consider them to be standard scammers, as they show their usual mode of operation, linking wallets for example, which is what these scammers do.
Maybe I want to add here, if we are really curious, then we can use a new wallet to connect our wallet. Just as many have said, never connect our main wallet anywhere, especially if it is a site that is foreign to us. I think we are not just 1 or 2 people who lost money in the same way, so we must not fall into the same hole.
I believe this is applicable to all new casinos out there where you need to connect your wallet just to play on their site.
This is why some stick to casinos or bookies where you need to deposit your coins or tokens and not directly connect your wallet via their site.
The person involve with such scheme is a newbie. So more than likely, he can victimize new users also who are tempted with the possible winnings.
A lesson we always need to remember, don't connect your wallet to a suspicious, new and no reputation at all from the community.
For new casinos who are promoting to be a web3 platform, this is their challenge - how to earn credibility from the players as this kind of scamming scheme is getting known.