I assumed it was a shitpost, instead it is a real tweet. What a time to be alive.
Jokes aside the only real reason I can fathom for the collectibles company to call their mother is because they had used it as the contact number in the registry. I would be surprised if this was some kind of intimidation tactic instead of just miscommunication - in the sense they probably just wanted to legally intimidate the itch's owner not their immediate family. They are not 2K ^/s^.
Technically speaking, AFAIK, it is some years now that Ariane has started a project about a partially reusable rocket
EDIT: Reading the article I think it is the same project? I assume I'm misreading your comment