oumagic - That's the basic idea, but it's kind of a mystery as to how the PIN recipients end up on the database that dispatches such offers. PIN codes usually offer anywhere from a 25% discount to a 35% discount. Sometimes for the GCH it may be 40% off.
PIN codes are sent out randomly to people - sometimes there is a mass mailing of them and you will see a bunch of DIS-folk talking about receiving these PIN offers at the same time. I think Disney pulls names and addresses from various mailing lists in the Disney family.
Sometimes - as was the case with me on my PPH stay this past December - I received a PIN which was not sent out to a lot of people. In fact, it seemed to only go out to people who had been on the DLR website and plugged in their dates and rates, ultimately "saving" those offers in the "Saved Offers" section of the My Disneyland account.
When DLR saw that we were not booking anything at the rates we saved in their system, they sent out PIN codes with better rates. And each PIN code is attached to the person's name/address to which it is sent, so DLR can check their database and look up your name for any offers you have received. The PIN code I got by doing the "Saved Offers" trick for the PPH was $163 per night - better than the $179 or whatever it was that I paid with an AP rate in the past. It was a 35% discount.
Even though there is no clear answer on what we have to do to receive PIN offers, what I always tell people is that Disney has to know about us in order to send us any offers. Many people say, "Well, I signed up with X, Y and Z and didn't get anything." And that's true - you may sign up with various Disney sites and not receive one single offer. Or you may not get one for years. Or you may end up getting 5 offers in the course of a year. You just never know.
But if Disney were to ever send a PIN offer, they would have to know you exist!
So....sign up with any and every Disney mailing list that you can think of. Ordering the DVD was a good start. Getting in the AP holders system is a good idea too. Get in the database for the Cruise Line, for WDW, for the Walt Disney Travel Company, for DLR, for Disney Family, for the
Disney Store, for ABC or any local ABC affiliate, for ESPN and anything else under the Disney umbrella (or the "FOS" - the family of sites/services). Just sign up with any and all Disney-family websites, send e-mails to Disney Destinations/Guest Communications, request DVD's or brochures, enter contests, ask for info to be mailed, go onto the DLR site and plug in rates & dates and save them in the Saved Offers, etc.