Originally Posted by Mutt

I remember when T-Shirt Hell was the only one but similar sites are everywhere now. They allow artists to submit designs then they get a % of the sales their designs make. My question is copyright infringement, many of the original designs feature video game, movie, cartoon, celebs - how do they get away with this? If a t-shirt design is a parody of say Mario and Luigi from Mario Brothers that is fair use?

It's a simple biz to get into.