Doesn't matter? Were they abusive? Did the new enterprise fix prices or stop competitors entering the whole market (Apple are not stopping consumers from signing up for Dropbox, just not through the App Store)?
Except I didn't change the 'argument'. I asked a question. Was the new enterprise abusive? There is nothing unlawful about having a monopoly, controlling a market abusively is though.
Apple are being abusive, few would deny this. Few have. Why are you?