Apart from the lobbying power of Facebook Twitter size company, it is pretty hard to deplatform them.

On a purely technical level Facebook runs their own infra. They would be hard to deplatform. The only people who are probably capable of doing that is the l3 type service providers. Even there Facebook , google own investments in undersea cables.

Also the size of their deal value to the vendor makes a huge difference. Amazon's revenue impact from parler would not even be a rounding number in their annual report. The impact of loosing fb for many vendors could kill them .

This is true.

Apple can't get rid of Facebook or Google Maps, no matter how much they hate them, but they can easily get rid of pesky startups while claiming to be standing on principles.

Not much of a moral victory there, though! (even if you believe they were right to do so, which I do not.)

Pre-Fortnite-sage I wouldn’t have been so sure, but they had 116m users at that point and were still banned. Obviously that’s still an order of magnitude smaller, but…

Also Fortnite is not utility application it lot easier to ban a game. It is much harder for say Google Maps, while we can discuss the "utility" of the Facebook app, even with facebook main, plenty of people use it as critical communication tool.