This is great, it'd be amazing if there was a place to comment on directly about the page using this extension or otherwise a central database where all discussion about a URL exists beyond the control of the page itself.
You actually can amplify the page and add a comment! Other ampie users will see that you've been there and the comment, and you can see the list of amplified links of other people, e.g. mine: https://ampie.app/posobin
Though you can't respond to others comments for now, but thank you for voicing the interest in that!
There are other extensions that provide just the commenting part (e.g. https://web.hypothes.is/, https://curius.app/, https://glasp.co/), but I find that they suffer from the cold start problem, i.e. it's rare to stumble upon comments for a page you go to.
