It's most likely a shill, or at best, someone who entered early enough that the site paid them in order to bring positive reviews to make themselves seem legitimate.
Do not believe what others say simply based off face value - a lot of the times, they are really just sockpuppets orchestrated by the exact people that are behind the entire scam.
This is not a particularly new scam, and it has been around for ages. A general rule of thumb is that if anyone is offering you something that is too good to be true, but they are asking you to send funds for whatever reason first (doesn't matter what it is, exchange/wallet/casino, you name it), take a step back.
Use your logic. If they are giving you free money, why do they need YOUR money? It simply makes no sense. It's a good thing that you didn't deposit anything, and metamask already flagged this.
It's a alt account of the user who started that scam website. No one ever successfully withdrawed any BTC from that site..
Also the creator of the website is a russian, he posted blockchain.com url with RU in url..
https://archive.fo/RenEP - You can check it here
Good thing the moderators are deleting the spam topics!