API is not a feature, it's a blood and air of the business. Why it's even considered situation when a large public business doesn't provide some API? Imagine a presentation that explains: breathing is extremly important for living, everyone who's not breath are dead now! And those who breathes are very alive! Bs.
I know this isn't reddit and I don't mean to be childish, but in case the creator of that slideshow will see this thread: slide 4 looks like somebody thinking about APIs while giving another person fellatio. You may want to rethink that slide.