I do.

I use SimpleLogin and ProtonMail.

Some sites have I’ll actually know you’re using SimpleLogin though and just say no, but they’re few and far between.

You could also use your own domain if you have one or buy a cheap one.

Then you can create as many as you like and just kill them as and when you need.

SimpleLogin has plugins for all browsers and phones so it’s not too difficult to create new addresses.

I do it with everything. The only people who have my real email address are my family. Everything else is a masked email. It’s especially nice because if I start getting spam on one email I can immediately tell which site sold my info and I never use that site again.

I do and it works great! I mostly did this to limit the blast radius of breaches, but aliases also provide an easy way to send those kinds of things to both me and my spouse.