I recently started using a + in my email address to make use-specific aliases, so I can more easily filter content from them or see if they're leaking my email.

I signed up for a rewards program in person the other day and the strange look I got:

Do you have an account with us?

Idk

I can look up your email

Ok, it's foo@bar.com

I don't see it, would you like to make an account?

Yes, but instead of that email, make it foo+yourcompany@bar.com

Uhhhhh.... Ok....

Like "you don't have an account but you have an email specifically for our business? Sus AF"

Having an untraditional gTLD like .xyz makes many confused as well, especially those not in IT.

Damn I'm over here with like 4 emails

Personal / gaming, the professional one with my name, my collage one, and the new one I made to make it harder to dox me

she's nice. You should check her out