It's funny, but I've never got a bounce back offer. When we stayed at ASSp this past February, I asked at the counter on our last day and they said there were no offers at this time. The other non-Fort trips were in friend's DVC condos and I assume they don't bother there.
I have received pin offers by email twice, but they were both for time frames I couldn't come down (DS was still in school).
j