I hope you will join the experiment.
Hypothes.is (which I knew way back from our ORCID days) is now active on this site as well. Hypothes.is is an offsite annotation and highlighting service, most commonly used by academics to annotate sites that do not allow it (there's a Chrome extension).
Since write.as does not have its own commenting or annotation service (the former coming some time soon, I am told), this is the next best solution.
Should someone annotate anything on this site, you'll find it either directly on the post/page, or in this collection.