Also, another question,
Is there a project that merge functionality of #Indieweb with #activitypub ?
E.g. a cross compatibily layer with PubSubHubBub, webmentions, etc
To let #indieweb user, website owner comment on #activitypub user & vice versa.
I know following RSS/Atom wouldn't be an issue & that works. I'm more interested in dynamic notifications, pingbacks, search, federation between activitypub & indieweb.
Re-toot, this important.

(pinging @smallcircles , because it is about small social circles, and you seem like the only indieweb person I know here on fediverse, you can ping people who related to IndieWeb)