SO, I think that the bottom line here is the bottom line, and a 30% cut ad infinitum is definitely going to keep Apple pushing the " but what about the children" approach, even when it is obvious what they REALLY mean is what about our cut ? :o)
my take, if it is good enough for the MAC OS it really should be good enough for their phones as well, as for the cut, they MIGHT be entitled to take something, it should NEVER be as much as 30 %, maybe a one off payment equal to 5% of cost of the app, and that is it
anything more is blatant profiteering IMHO