And if no one wrote apps for iOS how many people would buy iPhones and iPads? Yes, it is a symbiotic relationship. But Apple has better position to negotiate, because it is as single entity, and have a lot more resources than the the other side. If all the app developers were able to organize and boycott apple, they might be able to force Apple to negotiate better terms. But that would probably result in many of the smaller companies going out of business, unless the boycott was very short lived.

> Your $100 does not cover it.

There are almost 2 million apps on the app store. Assuming there is roughly 1 developer license per app, (some developers will create multiple apps with a single license, but others will have multiple licenses to develop a single app), that is at least in the ballpark of "hundreds of millions on SWE". And that doesn't include revenue from selling the devices themselves.