> different strokes for different folks. It pretty much boils down to this. Not only are vendor t-shirts actually a physical item but they are also often uniqu

> different strokes for different folks. It pretty much boils down to this. Not only are vendor t-shirts actually a physical item but they are also often uniquely designed; many vendors only provide certain designs for certain events. So they really become a badge of honor and can gain in emotional value: "been there, got the t-shirt..."