When a person uses multiple platforms, it is better to use different emails because when we register on different casino sites, their different email marketing mail files help us lose our important emails. And many times we get bored and delete the entire inbox and from there we lose our important emails. I never use my personal email address on any gambling platform or any platform from which emails can come frequently. I always use multiple emails for different sectors. This always helps to stay clear in terms of receiving all types of emails.
Isn't hard to create a different new email for every casino platform ? It will be difficult to remember and handle all these emails.
I would prefer to have two emails, one for my work and other one for different purposes like registering on casino or trading sites etc. One thing that must be taken care is that even if you use the same email on different platform, the password at all the platforms must be unique. Setting same password everyone can make you lose your money and important data as if hacker manages to crack one password he will get access to everywhere if you were using the same passwords everywhere.
It will be the craziest thing to do since there's high chance that people that will just forget those emails they created. They can save those details on offline platforms or as write it on anywhere they think safe place to store those details.
But so far I use one mail on casinos I played including Betfury and have separate email on exchange on which I trade.
From this so far I didn't encounter any issue, but of course I set different password on each platform I used since I'm trying to get wiped out if my one account might get hacked.