Too simple, sometimes naïve. I see what your did there ;)

I pointed out GFW as one example, and actually agree with you that it’s not the only reason exchanges are so limited.

However, I do notice that examples of failed Western attempts to penetrate China usually stops at Amazon and eBay: after these, popular platforms have been so pro-actively blocked that it’s impossible to know what outcome would be if they were given to chance to freely compete. And the internet turned social, which in nature runs against the Party’s grip on speech.