“My inclination is to be suspect” about Apple’s new service, said Shubha Ghosh, an antitrust professor at the University of Wisconsin Law School. Two key questions in Mr. Ghosh’s mind: Whether Apple owns enough of a dominant position in the market to keep competitors out, and whether it is exerting “anticompetitive pressures on price.”
Apple Antitrust Issues Raised by Subscription-Service Terms - WSJ.com
Don’t forget: iBooks is paying that 30% to itself. Any competitors must pay it to Apple. This move can potentially force Apple’s competitors out of business. Yet the competitors built the market— Apple is nearly the most recent entrant.