Not only if adult/nonadult but also at which price range if its a trial or if its for free etc.
If you have adult freestuff post buy ads on TGP's and MPG's there is a lot of traffic and people are always looking for something what is free.If you have a high quality product you want to get paid well you have to look for targeted traffic which are willing to pay for it like through keywords on google.....bannerads etc... TGP,MGP,Email,TV is working fine cause there you can promote your product on a big volumne.