A common method of getting free food is signing up for restaurants’ newsletters/email clubs. To entice you to join, many will offer a welcome gift, often a coupon for substantially discounted or free food. Here’s how you can sign up as many times as you want without having to create a new email address:
Assuming your email is FreeFoodGuy@gmail.com, the following are valid aliases you can submit–they’ll count as different email addresses in most systems, but all will forward to FreeFoodGuy@gmail.com:
FreeFoo.dGuy@gmail.com (you get the idea–the inclusion of periods anywhere)
FreeFoodguyemail@example.com (any text after a + sign).
And thus, with one email address, you can sign up for a newsletter as many times as you want.