[kuschku]

There are:

- 221 with over 5 accounts

- 74 with over 20 accounts

- 19 with over 250 accounts

- 8 with over 1000 accounts.

And only a handful of those have open signups (13 with open signups have >50 users).

Many of them are actually ActivityPub instances with a PDS bridge, e.g., https://join.wafrn.net/

And most of the other open signup instances are also primarily designed as their own social network, just using AT proto as a compatibility layer, e.g., https://sprk.so/ https://haruhwa.com/ (which is an invite-based, snapchat-style ephemeral social network), https://surf.social/, https://pckt.blog/ (a microblogging platform), aesthetic.computer (a collaborative programming/art platform)

That leaves only bluesky, blacksky, eurosky, selfhosted.social, self.surf and npmx.social.

Even during Facebook's heyday, the unsuccessful diaspora/friendica/gnu social/etc networks had more decentralization than that.

[ascorbic]

Spark, pckt (and leaflet, tangled) etc aren't using atproto as a compatibility layer: they're fully-fledged apps built on the network.

[Vinnl]

Right, but I think a typical Bluesky user never sees data from there in their feeds?

Don't get me wrong, I think it's pretty cool that you can run all these different apps and have them store their data on their own PDSes. And theoretically it's possible for everyone in my Bluesky feed to be on their own PDS and use different apps. But the question from a Mastodon point of view is: is that the case in practice, and if not, how likely is it that there will ever be a significant portion of non-Bluesky posts in an average microblog feed, on atproto?