No idea. Last I checked it was a letter of the alphabet. Microsoft used the letter as part of a name for a game console, but they weren’t stupid enough to try to use a single letter for an entire name. Only a complete fucking moron would try to force some dumb shit like that onto the public.
Maybe they are referring to the social media company Muskrat bought and is driving into the ground by making it a haven for fascists. But that company was called Twitter.