This is something we haven't talked about a lot around here, but I remember early Family Feud episodes where Gene would do ticket plugs, and also plug an address to write to if you wanted to be on their "survey mailing list".
I wonder how many surveys they actually sent out. Was it 100 even? What if somebody didn't return it? If it was more than 100, did they take just the first 100 that were returned? Or, did they abandon mailing lists early on and just asked 100 people walking around outside the studio?
Anyone have any info?