I think one of the messages here is that if you're a start-up and your product requires a third-party API that you have no control over to function then you're taking a massive risk. This isn't specific to Linked.In: API access isn't a right. If your product requires a third-party data source and you don't have any contractual agreement with that third-party you have to accept that the rug could be yanked from under…
But what about all of those software businesses that have built on top of the iOS API + App Store? Would you say that they are also taking a massive risk? Apple can cut off any app that it wants at any time, almost for any reason, and yet thousands of independent developers are building profitable businesses on top of their platform. The issue is not a dependency on an API or platform. The issue is the nature and cha…
Yes. Very yes. Any iOS developer with any sense is brutally aware that we serve at the pleasure of the king, as Jeff Atwood put it. Apple nurtures its developer community because a robust app store is a selling point for Apple hardware. If Apple decides your app runs contrary to Apple's goals, it's gone, and you better have a backup plan. There've been plenty of panicked anecdotes floating around the Internet on that topic. The grandparent's analysis is sound.
(Also: thousands of independent developers are building profitable businesses on iOS, but tens of thousands aren't.)