When a rabbi was tossed out of the Northwest WorldPerks program, allegedly for complaining too much he decided to fight back. He filed suit against the company and for the past 5+ years the case has worked its way through the US legal system. SCOTUS finally ruled on the case today. He lost unanimously. The court essentially ruled that the FF programs are covered by the Airline Deregulation Act meaning that state law won't be able to preempt them with breach of contract claims or similar. The justices did leave a small opening suggesting that as the programs become less and less tied to the airline operations and more about 3rd party partners that the ADA protection could go away. That would be an interesting shift, though I'm not sure how the interstate commerce clause would apply at that point.