No they don't. I don't know where you've gotten that information, but none of it is correct. I mean, a TOS could be written that way. But they're generally not

No they don't. I don't know where you've gotten that information, but none of it is correct. I mean, a TOS could be written that way. But they're generally not, because companies don't want to self-impose limits like that. The TOS usually has something like "grant the platform a perpetual, worldwide, royalty-free, non-exclusive license to host, display, distribute, modify, and otherwise use that content in connection with the service". See the word "perpetual"? That's standard.