It sounds to me to be clearly a tool for fans, not "Entepreneurs". I know tons of people who would love to analyze sports data for enjoyment, not profit. Since the data is so hard to get access to anyway, this API is a way to let those who are interested play around with things without being a potential competitor. ESPN wins, fans win. "Sort of like Zynga for sports-focused Foursquare groups" gets no dice, apparently.