Are the APIs you use really "open"?
api500.com
api500.com
And this article really isn't about openness of APIs at all (its not even all that much about openness or APIs -- application programming interfaces -- at all.)
Its mostly about accessibility, reliability, and accountability of service endpoints, for which the openness of the APIs provided by those service endpoints is one factor.
But it uses both "open" and "API" as buzzwords divorced from any concrete meaning.