 The signing of the Bill spurred Cerebus creator and self-publisher Dave Sim and "Teenage Mutant Ninja Turtles" creators/self-publishers Kevin Eastman and Peter Laird to sell or continue selling collected volumes of their comics directly to readers via their periodic issues, rather than through direct market distributors selling the collections at comic book specialty shops.Comic book professionals that have commented on the Bill conclude that it had little or no impact on the comic book industry.Creator's rights has long been a source of conflict in the American comics industry, going back to the medium's late 1930s origins.