I signed up for my Disney planning DVD in Dec, got an email code on Jan 19th for the April-July 4 code dates. When I registered at the Disney site I put that we were staying offsite and didn't need tickets. Also, you MUST select the boxes where you want to receive offers from Disney, I did not select getting offers from 3rd parties. If you don't select the "want offers" box, they can't send you an email.
I would suggest signing up for the DVD now and hopefully you will be lucky to be included in the next round of email codes.