If you're talking about different language fan circles interacting, that's immaterial to spreading interesting. For example, the anime industry has plenty of outside interest without the non-Japanese fan groups getting involved with the Japanese fan circle. Anime/manga entering the Western consciousness was the result of individual people being interested, starting translation groups, and getting the Japanese material out to the Western audience. As long as outsiders can see the material, fan group crossovers don't matter much. That's why fan subs/scanlations have a reputation of being terrible, since fan translators are often self-taught in Japanese, which can lead to incorrect translations of the language.
Seeing as the firewall blocks Chinese access to non-Chinese sites and doesn't block Western audiences from seeing Chinese material, I'm not sure how the firewall is relevant to your point.
If you're talking about commercial collaboration across borders, the firewall only mildly hampers things, but that's on the corporate level and doesn't really have anything to do with BNFs "discovering" a fandom/show/whatever and promoting it to their followers.
no subject
I'm not sure what point you're trying to make.
If you're talking about different language fan circles interacting, that's immaterial to spreading interesting. For example, the anime industry has plenty of outside interest without the non-Japanese fan groups getting involved with the Japanese fan circle. Anime/manga entering the Western consciousness was the result of individual people being interested, starting translation groups, and getting the Japanese material out to the Western audience. As long as outsiders can see the material, fan group crossovers don't matter much. That's why fan subs/scanlations have a reputation of being terrible, since fan translators are often self-taught in Japanese, which can lead to incorrect translations of the language.
Seeing as the firewall blocks Chinese access to non-Chinese sites and doesn't block Western audiences from seeing Chinese material, I'm not sure how the firewall is relevant to your point.
If you're talking about commercial collaboration across borders, the firewall only mildly hampers things, but that's on the corporate level and doesn't really have anything to do with BNFs "discovering" a fandom/show/whatever and promoting it to their followers.