Bringing together a few thoughts on this after we got into it in another thread; Twitter is dead.
(Organisations will be slower to react to this; but the people are gone).
On the morning of Friday 23rd, Pedal on Parliament chucked a save the date posting out all over various social media channels, including X.
At the time of posting, PoP had:
6,101 followers on X
0 followers on Bluesky
0 followers on Mastodon
1,404 followers on Instagram
683 followers on Facebook (page)
1,351 members on Facebook (group)
By 4pm on the 26th (today), here is a summary of all the post interactions on X vs. Bluesky:

Bluesky: 38 reposts, 5 quote posts, 35 likes

X: 1 like. 1 repost. They were both by the same person.
Over the weekend, after the impact of the posts and general grapevine, the follower counts have changed as follows:
6,101 followers on X (=)
67 followers on Bluesky (+67)*
3 followers on Mastodon (+3)**
1,417 followers on Instagram (+13)
682 followers on Facebook (page) (-1)
1,361 members on Facebook (group) (+10)
* New followers on Bluesky can be attributed to activity undertaken to follow known cyclists, mutuals with other orgs and starter packs like Blackford Safe Routes & SW20's lists to follow
** Mastodon is not a 'full account' presence but a federated bridge that mirrors profile changes and posts from Bluesky
In Summary:
X/Twitter's mindshare is only continued by the presence of organisations and services there who have not had the training, tools nor policy implementation to migrate them elsewhere. The people - at least as far as 'oor bubble' goes - have left it.
(This is not a particularly academic example but I think it's both interesting and instructive).

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