Good they do it. Facebook took TBs of data to train, nobody knows what Goog does to evade whatever they want. the service is actually very convenient no matter faang likes it or not.
Part of me thinks that the open web has a paradox of tolerance issue, leading to a race to the bottom/tragedy of the commons. Perhaps it needs basic terms of use. Like if you run this kind of business, you can build it on top of proprietary tech like apps and leave the rest of us alone.