It's just corporate astroturfing.
AMP is obviously conceived, funded, and implemented by Google and its employees. If you squinted your eyes and tilted your head just right you could see a "good for the web" angle with faster mobile pages.
But AMP for email & AMP Stories have nothing to do with making the web faster, it's just another part of Google's attempt to essentially fork the web & control the platform so they can compete with Facebook by shoehorning FB/IG/Messenger features on to the web (Instant Articles, Stories, Carousels, "interactive" email etc).
That's bad in and of itself, and for Google to present its corporate strategy as an "open source" project so it can enlist the help of volunteers and those passionate about the web is disingenuous in the extreme.
There are far more worthy projects that could use volunteer help than a $750 billion company's corporate strategy.
Further thoughts here: https://twitter.com/lukestevens/status/963905898895699968