"The owner of the @x Twitter handle confirmed that the company, now known as X, took over his account without warning or financial compensation, telling him the handle is a property of X." https://techcrunch.com/2023/07/26/twitter-now-x-took-over-the-x-handle-without-warning-or-compensating-its-owner/
TechCrunch is part of the Yahoo family of brands

This is, um, curious. Only one of my auto cross-posts from Mastodon to the platform formally known as Twitter didn't show up on the latter today (attached). I wonder why.

@w7voa Have other cross-posts you made that tagged people via @'ing them showed up?

For a long time this was not supported via posts made via the API, alternatively sometimes it would work but just show text rather than tagging the account. Depending on how the API call is configured, the warning about tagging an account in the text may be interpreted as an error.

I'd try tagging someone else in another Masto post and seeing if the same thing happens.