What would you say is the best example? I'm aware China does aggressively censor US media type products that don't toe the Chinese worldview, but I'm less familiar with absolute bans of major companies of this sort.

I may be misreading the situation here, but to me this seems like a rather extreme escalation that would be analogous to China banning e.g. Apple or Google based/created devices after questioning them over their relationship with the NSA [1] and being [predictably] dissatisfied with their responses.

https://en.wikipedia.org/wiki/PRISM