She lays it out as a progression, holding back certain acts to drum up interest in them. Her agent is Speigler, he's a wily Jew and knows how to squeeze dollars out of lemons. She says that she waited a year in between each: anal, DP, IR.

Now you can say that she held out because she wasn't into IR, or you can say she was getting the Tritone's of the world all worked up so they'd run out and purchase those dvds in droves, therefore driving up her asking price.