the only way to get to change their greedy ways is to sue them in court. Fortnight is epic's sacrificial lamb to get the ball rolling.
This lawsuit isn't about epic getting a better cut in the app store but bringing to attention that the whole business model of the App Store is "illegal" and wrong. They're not suing just for them but also for the thousands of iOS developers who've been ripped off too.
So, the Google, Playstation, Xbox, and Steam stores are illegal, also?
I'm not saying that the 30% is good. I'd rather see 15% for all of them.
The only real problems I have with Apple is that they don't check things well enough and that they don't apply the rules evenly.