Appreciate the comments guys and feedback.
Regarding those email, the industry is full of databases and user emails, companies that resell them or "email traffic providers". So sometimes, your email might end up included in one of those email marketing campaigns that is targeting some GEO's or igaming audience.
Yeah, for sure, some of us already know that kind of practice already, databases being sold underground. And probably that's why the OP is somewhat confused as he really did not registered on your website and thanks to your for confirming it.
Maybe that was the reason why you got the email from us, maybe previous ownership did some similar traffic campaigns. This won't happen anymore, so don't worry. All our mailings today we have unsubscribe button, and only users who are actually our registered users are getting them.
That's where the used of unsubscribe button is, and even in the casinos that I have registered and play, and I do not wish to play in them anymore but still receiving such promotional emails, I will used this button for them to not be bothered me anymore.