For instance, Facebook. For months now, the Like button has been completely broken on any sites that classify themselves as og:type product. Which is basically, very many indeed.
The bug? Some idiot at Facebook apparently registered type "product" as belonging to a particular app id. Now no one other than this unknown entity is allowed to use og:type product.
The problem is, it could be easily argued that the single-most feature of the facebook API is the like button. If the very core of their "business" is so overwhelmingly neglected and broken from an API perspective, how can anyone trust them to do anything right after that? How can anyone feel comfortable building on the Facebook platform, basing the existence of entire products, startups, and companies on the whim of such a ridiculously unorganized company and their broken API?
The age of web apps is great, but you cannot blame anyone for lamenting the end of an era where your products were as good as your code - not reliant on the whims and caprices of a company that you can't trust to maintain their API - or even build it right in the first place.
https://developers.facebook.com/bugs/285421101492706?browse=...
Facebook has 'acknowledged' the issue, but what's the use of that?