One of my favourite podcasts, the Masocast, has an interview with Domina Irene Boss. Boss has been involved in both the pro Domme scene and the BDSM video scene for a long time, and has good historical insights on both fields. She was in both at the ground floor, and was able to vacation in Hawaii from the proceeds of her DVD sales. These days, particularly after the advent of Clips 4 Sale, the video market is so diversified that this isn’t possible anymore.
She also has some inside knowledge of the Other World Kingdom in the Czech Republic, which is about as close to “the Club” or “the Marketplace” or “the Network” as we’re ever going to get in real life.