Ah, perfect! One question: is Ticketmaster rejecting non-"Big email providers" ? I suspect they do, due to bots (wouldn't it be the same with Tinder, etc ?)

I don't know. My Ticketmaster account was created in August, 2005, and is a one-off email address at my personal domain. I have no idea if I could create an account like that today (and I'd be afraid to try).