If the descentralization of social networks continue, we will have to prepare for the eventual rise of the instances wars, where people will start to fight about which instance is better and which one is weird to be in and so on, but that’s for the future of us all.
Taco Bell and Pizza Hut have been under the same corporate ownership for decades, tho. Pepsi spun them out in 1997, fully 30 years before your dystopia.