I think I received a couple of emails from casinos "where I registered" and actually I didn't even hear about them... In any case, the process is always the same: I don't visit those sites at all, report that mail as spam, and block it. So I haven't received any such mail lately.
It only means you allow them to send promotional emails. I sometimes did this because I might receive a mail that interest me and I will surely check it out to see if it gives me more advantage. If you haven't heard about them, it only means two thing and that is one you have opted to not receive a mail from them and then two is you haven't registered on this casino yet. Anyways, good thing that it is working like a charm. That means that the email provider does really care. I think the reason why we got such mail is maybe because of our information that have been sold out also by those platforms that we registered in and used. It sucks.
also from casinos that I don't even know they exist.
Maybe you only forget it? Though indeed that some are intentional and this is why they go in the spam folder of our mail boxes. There is no harm on them as long as you didn't touch them there.
there were also quite a few emails from casinos that offer lots of free spins, some money for playing, and special promotions, I do the same with other emails from services that promise something... Maybe not all of them are scams, but this type of advertising makes me think so. So, I don't think twice about what to do at all.
Some of them might have a potential but they only wasted it by doing this type of approach. Yeah, we are scared to deal with it, as we always heard of that golden rule that when something is too good to be true, it is definitely not true. I don't know for some, maybe there are very greedy to click the bait, so these casinos won't totally get zeroed out after all. Lucky them.