When I checked in this evening, delta.dumb offered me a Sky Club "one-day pass" for $39. I didn't look at the T & C, but this seems to be called a day pass rather than a single entry coupon, so it's a 22% discount from the usual price of $50. The strange thing is that my FF number was correctly attached to the reservation, clearly showing me as a DM, which should obviously mean that I don't need a day pass to enter SCs when I fly DL. I also have at least three other ways to get SC privileges, which DL should also know in my record. It almost makes me wonder whether DL is hoping to collect additional money from their stupid elites. It's hard to believe that a DM wouldn't know that he/she has SC privileges.