I guarantee you their license from inception has given them control and ownership of data you put on the platform in perpetuity
This is basically what everyone does and no one cares because it’s buried in a 50+ page tos/eula that changes every few months and apparently is binding if you simply click a button
The tv stuff is what everyone’s mad about right now but do you know how many photo kiosks and websites reserve the right to use the pictures you upload for printing? How many games and cell phone apps profile you? How many smart devices phone home with local WiFi ssds, usage patterns, etc?
Once they establish ownership they can exercise control pretty much however they want. Model training is just the new “this will be a cash cow somehow” fad and everyone with a massive dataset is looking to capitalize on it
We have let the advertising and data collection industry get completely out of control because the overwhelming majority of people are mindless consumers that don’t give a fuck