So you're looking for a word that's a descriptor for different types of social media e.g. aggregator vs video/image/audio hosting vs microblogging. The first word that comes to mind is that they might be different paradigms of social media?
Kbin federated with Mastodon and lemmy
Well that's three, there are at least 1200 more and that's not including the YouTube and Instagram like sites that are, or could be, federated, and they all have slightly different feature sets depending on what software they're running.
That's what I'm talking about. A way to describe those feature sets in a word.
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