Mutt, if you look a little more closely, you will find that MANY countries have thriving online porn industries. However, those countries do not interact directly with the "english american style" original online porn market at all. They market only in their own languages, and they don't even attempt to deal with people on our side.
See:
http://www.tokyo-hot.com
http://www.pornographynews.com/
http://www.hhasia.com/
All examples of porn in the asian marketplace that has absolutely NOTHING to do with the US centric marketplace we all find ourselves in.
Their society norms, what is acceptable and not acceptable, model releases, whatever is different and doesn't fit with what we do in this market. Their processing, payment and such is all totally different.
Just because they aren't here doesn't mean there isn't a porn industry, it just isn't in your face.
Alex