>Protip: always use plus aliases when signing up for things like this. Use a unique plus alias for everything you sign up for (the convention I use is e.g myemail+yourcompanyname@mydomain.com). This convention lets you be sure exactly who sold your info when the spam comes, based on the to address, and it also lets you easily block email from that source after you've got your tickets.
I don't use "plus aliases." I don't need to. I've owned my own domains for just about 30 years, so I just use @mydomain.com and then block any emails that start spamming or are just annoying.
Protip: Host your own emails so those greedy scumbags can't cut you off whenever they please, leaving you unable to access all the crap you authenticate through your "plus aliases"
Edit: N.B., I appreciate that you brought that up. Some folks may find that useful even if I don't. That said, I still say folks should host their own email if they have the resources (minimal) and inclination (less so).