No, it is https://mu.se/.

It is a new brand from people owning 'Utimate guitar' guitar tab site, who acquires Musescore two years ago. I'm sad to see two of my most use software down in the dark side.

Hang on,

Surely not these people?
https://themusegroup.co.uk/

If the alarm bells weren't ringing before, they should now be jumping off the
wall!!!