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Same, but I think you got it backwards, at least based on their description.

User-generated content = content generated by all users (i.e., users you follow and users you don't)

Network-generated content = content generated by users in your network (i.e., users you follow)

Makes sense. I think my framing would make sense if it said platform-generated content. Network per your framing makes more sense.

The description by the author makes it confusing with "network" being used in both terms; definition of one and the term itself in the other.

Yeah had the same issue as above but this does help clear it up