Please Give me Clues on Generic Niche Traffic
 

Can someone fill me in on some clues... I have alot of adult webcam traffic, or at least let's say traffic to adult webcam sites..

Now I have tons of adult webcam domains... they all push about 2-3k a day in traffic, and I have about 5 niche adult webcam domains very specific good domains..

My problem is the following

The niche domains which are very good are #1 in google etc
for that niche but the searches are very low and only get about 3 clicks per day. They convert a sale every other day so they do about 1:10

All my other generic sites are doing the 3k a day and converting 1:10-15,000 if I am lucky... Is there something I can do to change this pathetic ratio?

Why do these generic sites not convey the user into signing up?