Anyway I do remember FB's "a cool "open source" way to do front-end development, feel "free" to use it, you can't sue us though". So maybe there is some shitty clause like that when you sign up.
Withholding your money and then when you (rightfully) sue them for that, retaliating and kicking you off the platform entirely?
This is true (if we take "was" literally). Though IIRC it was only if you sued them over patents.
> React is MIT licensed
And this is also true (now).
In this situation there would be no judgement because there is no right to have a facebook account therefore they can close your account because they don't like your face or indeed because you sued them. Why would you imagine that a jury would basically award you all facebook's money because they closed your account? Yes sir Mr soandso they were clearly jerks I award you Facebook now try not to be as big a jerk as Zuck and good day to you!
I looked into it and while a hassle it is on par with renewing your car insurance level of hassle (so some hassle, but doable, a "side project"). And worth it for the "stick it to the man" factor. In the end I got it almost all back by being nice, so no need.
In addition to small claims, there are credit card charge backs.
I believe that in many states the company that demanded arbitration has to bear the costs also.