I have an email account specifically for gambling though I may have connected it to a couple of non gambling stuff as well lol but I rarely receive scam emails compared to my general crytpo email accounts. Then again, the latter are much older and have more services connected which pretty sure played a part.

In hindsight, emails are fragile and services typically share our emails with 3rd parties so there are a lot of sides where leaks could come from hence it could be difficult to point fingers.