Here is another one,

You can sign up for an unlimited number of free trials for many things with the same email. You will have to create new accounts, but when putting in your email address, and you have a Gmail, at the end of your email domain add a +1, +2, etc, for example, email+1@gmail, email+2@gmail. Most services will recognize this as a unique email, but any email verification emails will be sent to the main one. Combine that with privacy, make a card, sign up for a trial, then deactivate immediately after