I can understand why the owners of the copyright were upset in this case. This was not a zine that's being sold at conventions or through the mail. The vast majority, if not all of those publications are immediately recognizable as a fan project. They don't look like conventional hardcover or paperback books. In this case, there was no attempt made to identify it as fanfic or anything like that In fact, the description implied that it was licensed property. That took a great deal of nerve. Also, with no printing or shipping costs, every cent that didn't go to Amazon was pure profit.