It’s always hard to tell if they seem legit, raffle sites have been around for a while now (usually big ticket items like cars, houses and even holidays), no idea if they are regulated and the last few years saw some of the big ones go into administration (I know there was some controversy surrounding auction type systems rather than raffles) but I know someone that won a PS4 Pro + OLED TV Bundle from one of them last year so there are definitely some legitimate ones out there.