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by tscs37 2899 days ago
It's part of the Social Group at W3C IIRC. WebSub solves problems around RSS, notably that clients have to poll a lot and smaller sites thusly need to maintain those requests.

WebSub solves that by designating a hub that can handle this instead. Ie, you federate your blog feed to elsewhere.

ActivityPub fills another niche, mostly everything around human interaction in social networks.

WebSub could be used to feed data into ActivityPub networks.