[codeisawesome]

It's funded by Google completely according to TFA, and it's filed under "Infrastructure - Google Cloud Platform" - I'd hazard a guess that it's probably just for Google Cloud.

They might extend it for AMP sites, maybe..

[goodcanadian]

I highly doubt that they would refuse to sell bandwidth if there is a market for it. It is a very valuable market.

[arccy]

Of course they sell it, though Google Cloud