Can't tell why. X doesn't let signed-out users see anything, the value of a shortened handle is basically zilch now.
>X also has a history of commandeering desirable handles from users that were actively using them. The company took the @X handle from a San Francisco photographer in 2023 without compensating him, though he was offered "merch" and a tour of X's headquarters. That same year, it also took the @music handle from a longtime user with more than a half million followers. Last year, the company swiped the @America handle from a reported Donald Trump critic. The handle is now used by Musk's super PAC.
If people are paying subscriptions for user accounts, they should be exempt from advertising and all associated tracking.