Interesting. But Facebook's platform != Facebook, so I don't understand the maxim that "the value of everybody that uses the platform must exceed the value of the company that created it" in order for it to be true.
You could say Apple's App Store and Google's Play Store are platforms, they even offer services (api/web-services, libs, frameworks, etc.) and devs build on-top and make living off it. But that ISN'T the company. Google has search, cars, ads, etc. Apple has it's own crap going.
Furthermore, Apple is worth 1 trillion dollars. Must the value of the platform as determined by "everybody that uses it" exceed 1 trillion? Or must it exceed the yearly revenue of Apple instead?