What is Rozbit and did I just get $4.7k?

I got a message on Discord from user @ Waterlogged saying I won a giveaway for participating in Crypto-related Discord servers (I am a member of the Garlicoin (GRLC) discord server). The message tells me I won 0.74BTC and to claim it on rozbit.com. I made an account and the website appears legit. I don't have a bitcoin wallet set up atm so I haven't tried to withdraw them yet. Is Rozbit a legit coinmarket or is this most likely a scam? Any help or advice is appreciated.