Earlier quoted context omitted.
They have a monopoly for the iOS platform, at least. And in some jurisdictions you don't need a monopoly to be guilty of anticompetitive behavior.
Do you have the same stance on Twitter? Twitter has a monopoly on the Twitter platform and may choose not to provide API keys for apps that it doesn't want to exist. Is this abusing a monopoly? If not, why not?
http://www.pcworld.com/article/2104603/metrotwit-vanishes-as...