With ND, you can check the source of the traffic. I have a few adult domains there, I found that it's nearly always Russian traffic that gets $0.00-$0.05 per click.
US traffic earns the most, my highest click being $0.80. If your traffic is Russian or similar, you will have problems with it anywhere you go. If you park it, expect <$0.05/click. If you forward it onto a $35/signup program then I doubt you'll see any improvements or signups (in my experience anyway).
What I did was leave the domains at NameDrive but optimize the keywords throughly using the Overture bid tool
here. You can make a few extra cents out of Russian clicks and a lot more from US clicks.
Also, use the "User Searches" section on the domain's settings page on ND to find what users are searching for. You can then use that info and your knowledge of the domain (past uses, the name, etc.) to apply a more relevant keyword (eg. change "porn movies" to "lesbian porn")
Try out the different templates too, ND currently has 3 adult templates - adult light, adult dark and adult canvas. If you choose the ND's normal canvas or default you can choose between 3 other headers - adult, adult/gay and adult/lesbian. Changing the template can make all the difference in CTR.