As I see it, the problem with the revenue based programs is that there don't seem to be any barriers to regularly raising the revenue requirements. There seems to be market resistance to raising the mileage requirements, which is why increases were relatively rare. Not so much with spend requirements. From the introduction of the spend requirement over at UA, there has been an approximate 40% increase in the 1K limit from the original total to the Pre-COVID, no PQF total.