Yes, they will still send you updates and promotions which will only tempt you to try betting again. So it's better if you'll unsubscribe from their promotions or might as well change email and mobile number for you to totally eliminate your contacts with gambling contacts which I think is helpful. Stay away from anything that will attract you to gamble again.
But gambling ads can be found easily now since they're already promote their casino widely, even you didn't even search that. Like how you're visiting a site about cooking or something, you will see a gambling ads. If you're watching a popular youtuber, you still see a gambling ads since he's promoting the casino. Watching a sports as example, you will see a casino name as a sponsor, it's too many and hard to hide.