Wait, are you intentionally ignoring the fact that OF is the middleman? Because it definitely is, making about 1 billion dollars off of 5 billion dollars of transactions. Or are you saying OF is a "good non-toxic middleman".
I've never done business with them and am not interested in buying that kind of content, but it certainly seems like an improvement over any more traditional sex-related work for those who are interested in being in that market.