It's the collector mindset. When someone is very interested in a particular niche, he or she may have a nagging feeling of an incomplete experience if a particu

It's the collector mindset. When someone is very interested in a particular niche, he or she may have a nagging feeling of an incomplete experience if a particular version of literature is missing from their shelf, or a rendition of art/music, or a trivial piece of their favorite game. It's irrational, but very human. There's also the patron mindset - some want to feel like they are maximizing their financial support for a particular creator or shop and any trinkets they receive in return become a form of public prestige dressing - like philanthropists having their names on a supporter wall.