moving the period around in an email address allows some sites to see it as a new user, but ignored by the email client.
so new.user@email.com and n.ewuser@email.com can both make accounts, and not even need to make a mask.
this probably works better for some domains than others, but I’ve had great success with it.
need to still be able to get in and cancel the service before the trial ends.
there’s probably a lot of better ways to do it, but I only need a free trial for small stuff a few times a year, so I’ve never looked too far into it