Is this site 100% AMP? That is the goal but not quite there yet.
Does this site collect all AMP stories on the internet? No, this site follows only stories not behind any paywall from the publishing partners who worked with Google on amp-story, the AMP project development sites (to see what's new), Google search stories, and experimentations on this site. Beware that amp-story is still experimental.
How can I keep track of new AMP stories? You could, for the time being, follow (like) the facebook page: https://www.facebook.com/omoiwords, or bookmark this page.