We speak often of "The Kettles". I was wondering who they were. Some possibilities:
1. once in a lifetime family fliers (as implied by the name)
2. sub-silvers
3. frequent flyers who are indifferent to loyalty programs
4. non-US international travelers (much harder to get FF status on a US carrier if based overseas)
5. DL/AA/US/WN frequent flyers.

I was recently a Kettle on AA, having had the travel booked by another company's travel department. It was in domestic F so it really wasn't that bad.