"Competition law, known in the United States as antitrust law, is law that promotes or maintains market competition by regulating anti-competitive conduct by companies."[1]
One could argue that rejecting apps that make use of (or in this case encourage signup to) Dropbox is anti-competitive conduct since Dropbox is a competitor of iCloud (isn't it?)
One could argue that rejecting apps that make use of (or in this case encourage signup to) Dropbox is anti-competitive conduct since Dropbox is a competitor of iCloud (isn't it?)
[1] http://en.wikipedia.org/wiki/Competition_law