Pocket Gamer: Remember the conclusion to Lord of the Rings? Where the eagles swoop in to grab Frodo from Mount Doom and everyone thinks: "well why didn't they just get the eagles to fly them in to start with?"
The answer to that particular question is, of course: "because that would have spoiled the story."
Dungeon Hunter 4 has its own mighty eagle, and it's called IAP. The thing is, this eagle is a greedy pest that constantly sticks its beak into your business, cawing 'Pay me! Pay me!' like some kind of mercenary Mr Cadburys Parrot.