Because nothing says "METAL!" better than a chubby guy in a Slayer T-shirt holding up a Coke (or a Dr Pepper or whatever the fuck it is) in triumph, another chubby guy with a haircut that I sported in the early 90s holding out his...gasp...open wallet, and a cute chick in shorts primping for the camera. Oh yeah, and the name
Gas Mask Catalogue. Feel the meh-tul. Feel it. PHEAR THERE MEH-TUL. PHEAR IT!!
In their defense, I haven't actually heard the music. However, if the description's anything to go by, I'm not inclined to check it out