This is definitely a scam site
This is definitely a scam site. I saw someone mention it on Threads saying that there was a code (MRBIGWIN) that would let you redeem $3,000 so naturally I checked it out. I searched the site and typed in the code when registering, and got an account with $3,000 on it immediately after.
That was the first red flag: there was no request for verification, no code sent to email, nothing. Just typed in an email, password, and boom, got an account. Practically every site on the internet at least verifies your email but this "betting site" doesn't?
Here's the second red flag: the site says they're celebrating reaching 50 million users which is why they're doing the promo, but somehow nobody on the internet has heard of this site. There are no mentions of it online AT ALL. No mentions of the promo anywhere, no complaints about their service on social media, nothing. They don't exist beyond the site itself.
The third red flag: like the other reviewer said, they require you to do some identity verification by sending them money first before you can withdraw the "$3,000". Identity verification usually involves checking your ID and face, not sending money.
It's very obviously a scam.