Because DL gives it away to Elites. Unless you are EXP, you are paying something. I have moved ALL paid premium cabin to AA. I will take it for free on DL, but when its coming out of my pocket, the experience on AA is SOOOOOOOOOOOOOO superior to DL. The brainwashed DL "elites" are so transfixed that they got an F on their boarding pass that they can't realize it is simply not first class at all. Come on, DL - tighten it up and do better!