Back when I used to fly delta exclusively as a diamond and they began testing tsa precheck, I signed up (without having global entry or any trusted traveler number) and was getting prechecked 100% of the time when I flew. Now I'm flying more United as a 1K, I have since signed up for global entry and added my passid to my precheck opt in, and I'm getting 3 beeps at the airport about only 20% of the time!! What happened? Am I just suddenly having really bad luck? I fly weekly, so this isn't an occasional thing.