The porn industry needs to learn about product placement.
Sex toys, rings, mail order stores etc could all be paying nice sums of money to have their products "featured" in a porn movie, at whicgh point, the producers would encourage as many free downloads as they could since this would increase the amount they can charge to advertisers.
Heck, even doctors could pay to have their names featured:
guy to girl: "I really love what Dr Boobs from Los angeles did to your breasts, they look so much better".
And if this becomes more popular, even beer/booze companies could get product placements ads in porn movies.