This is my first time, so I hope I've got this right...
"Zinio has teamed up with your favorite publications to create The Read Green Initiative. A program designed to offer you one free digital magazine subscription of your choice! Join The Read Green Initiative to explore digital reading and go green.
With Zinio, digitally read the magazines you love. See your favorite articles and ads evolve off the page into rich digital experiences. Check out the brilliant colors, searchable text, clutter-free archiving, clickable links and exclusive access to issues. Many that havent yet hit newsstands.
With The Read Green Initiative your first annual subscription is free. A portion of proceeds for any purchases made on this site will be used to purchase eco unit credits and buy more trees.
Be part of The Read Green Initiative."
All you need is an email address...no credit cards or anything.
There are dozens to choose from including Popular Science, PC Magazine, Reader's Digest...and, erm, Playboy and Penthouse.
And there doesn't seem to be a limit to how many times you can sign up - just use a different email address!