Earlier quoted context omitted.
> I've been tracking their GitHub and what is happening is that while yes, the source is open, they won't let you add anything they don't like. Well, thats basically how Android works. And with the upcoming policy changes (in CDD and GCM) things will get even worse.
It's pretty much how open source works everywhere - you have to convince the maintainer to adopt your code. If they don't, you've got the options of either being sad or forking it and trying to get people to use your subjectively better version. It's open source, not anarchist source.
You see the other half of AMP is completely proprietary and runs on Google's servers. It doesn't matter that you can edit AMP because the server (Google's end) will refuse to run your edited version.