Sorry never seen enhanced ribs at Costco. I also have not experienced anything foul with the competition briquettes. It could be a bad rack of ribs or I hate to say it, user error, no offense, it happens (poor airflow, too much white smoke, etc.)
Peace and Smoke,
My Weapons: Custom rig - Kandi, UDS; Bubba Keg; 22.5 WSM x 2; 18.5 WSM; BWS extended party; BWS Gator and an Onyx Oven; 29' ft Coachmen Leprechaun (Lola).
Dan Chambers get well soon, so we can tell you to "Shut up Chambers"