Just got an interesting email, look at the sender. Asked the live support if .id is an official mirror and seems like it's not. Perfect clone though. Obviously the email doesn't make any sense, why would betfury send a promo for rainbet, haha.

Anyway, if someone else got this, be aware and don't click on anything.
To good to be true offer lol, also yeah there's really no point for Betfury to send such massive bonus like that to a Rainbet players, since in reality they don't have anything gain for doing that action. Also majority of casinos will focus on their own promotion and will not provably waste their funds to offer something huge to players which didn't play on their casino.
To dangerous to click those random offers we found online that's why always good to verify each emails we have found there.