"...they don't provide service but market access..."
They only provide app distribution service. Apps are a feature that the devices provide, a feature that sells the devices. Apps are a benefit to Apple and a requirement for them to compete.
"the whole point of the iphone app ecosystem is mercantilism. "
False. It's almost as though you don't know what a computer is.
"if people are only interested in creating apps to rake in money then i don't find it really outlandish that the market access provider charges whatever fees he can justify to get a cut, including having to pay for the privilege of developing in the first place (!!!). "
That says a lot about you then. You support taxation going to private corporations for no reason other than monopolistic market position. You are the polar opposite of a free market capitalist, yet you no doubt justify your position as capitalist.
"...wether the provider can get away with it or not is something i'll leave entirely to the whales, sharks and sharklets in the ecosystem to figure out, may they eat each other's livers out."
Perhaps they will, after they eat yours and everyone else's first.