Are you serious? One of them was briefly higher than the official app in the App Store. Third party PDSs are still a small percentage, but even that is growing.
Look, Bluesky has no shortage of faults, decentralization being one of them, but all of the attacks I see here seem to come from pure ignorance.
Which one?
Flashes, I think? I’m just recalling screen shots from a few weeks ago, could definitely be wrong, but there are a few popular alternate clients now.
That seems to be the most popular indeed, but it's not a normal client, it's a niche client that only displays photos and videos apparently (?) by filtering them from the official Bluesky thing, and it has 263 ratings on the App Store.
The other one I saw mentioned in multiple places is GraySky, which seems to be a fork of the official client with some modifications, it has 63 ratings.
Also Skeets, OpenVibe, Bluescreen, and a few others…
