^^^ So is that how it works? Visit regularly, then stop for a while and that's the way you get them?

So many people have tried and tried to break de Pin Code "formula" without any success. There was a poster on another thread who went to WDW with a friend years ago. The friend had died and yet Disney was sending the deceased person a Pin Code to the Disboards poster's address.
Anyway, regardless of what the Pin Code "formula" is, do call Disney and ask them to see if your Pin Code can be applied to your dates. You might be pleasantly surprised!