I agree in principle. However, it's not "easy" money, he produced a quality, well thought out app and then got lucky (or executed a well thought out strategy) with marketing.
Forgive my pedantry, but I hate to see a favorite quote of mine used with the wrong context for the word "steal":
"One of the surest tests [of the superiority or
inferiority of a poet] is the way in which a poet borrows.
Immature poets imitate; mature poets steal..." [1]