Have you never seen someone walking down the street in a Red Sox sweatshirt? Have you never seen a cyclist wearing a Team Sky jersey? People want to be associated with their heros.
Sky jerseys are getting rare but Bora, Jumbo etc-a lot.
One of the coolest colourways of Trek is the red/blue with the yellow Segafredo sign.
I mentioned above Mapei-this is still one of the coolest paint schemes for Colnago steel bikes.