I’m finally getting the idea of #WebSub (or PubSubHubbub).
This helped a lot: https://beesbuzz.biz/blog/8139-Some-WebSub-Atom-observations
Shame that there are not many readers (specially foss) out there so I wonder if I should bother with this at all. Didn’t like any of this short list (dogfooding and all) 😕