DrCaleb DrCaleb:
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The combination of your phone number and email is used by companies to relate your activities across many sites.
I recently setup a domain email with a catch-all. Slowly as I transition to using that as my primary email, if I use it to sign up for something, I preface it with where I sign up. So if I used it here, it would be
CKA@domain.ca. Then if I get spam to that email, I'll know it was compromised or sold. And it means that I don't have any official sign in email at any website that can be used to compromise my domain email.