"Here is how platforms die: first, they are good to their users; then they abuse their users to make things better for their business customers; finally, they abuse those business customers to claw back all the value for themselves. Then, they die."
Facebook, TikTok, Amazon, it's everywhere. Once a platform has lock-in from users it turns its attention to vendors. Then once they're locked in it rakes in the profits until nobody can tolerate it any more and something else takes its place.
This is because capitalism requires infinite growth.... which is literally fucking impossible so everything either grows infinitely or dies..... or option three: gets so fucking big it abuses governance to prevent itself from dying while murdering it's competition.