You're right. I was more pointing out that "people knew" before hand that a ban was coming, which means other platforms/groups knew about it and so could have prepared for it. If anything that's less of an argument that it's coordinated and more an argument that they're piling on after seeing one platform do it.
Thanks, but in my first comment I described exactly that possible scenario of companies rushing these announcements once they realized a competitor was acting on the issue. Once again, I don't know why so many people are assuming this is coordinated.