Oregon jerseys in 3-4 colors....the only option available for BYU was navy blue.
I think that kind of explains it and I saw Oregon's fans at the Fiesta bowl a couple of years ago wearing yellow, green, black, white and gray Oregon gear, while I saw KSU in purple or white. Let's just say I want the basic "O" logo....I would have at least 5 shirts in the various colors. If I was a KSU fan wanting the basic KSU logo, I'd have two.
Limiting to one color limits sales. If BYU provided more color options, I'd buy a lot more gear.