The "teen" market is so wide & varied surely you should tailor your free sites to the actual teen site/s you are promoting. There are so many different kinds of sites involving "teens". From Non-nude tease to extreme hardcore.
Paul always mentions Sapphic Erotica as a teen site but I see it as a girl/girl site. It's about young women enjoying lesbian sex. I know that the site does use the word teen quite often but I really don't think it needs to. It has a very broad appeal among porn consumers, which is why it converts & retains so well.
The majority of men are turned on by this kind of ff & fff material. Many women are too. Age doesn't come into it all. People who are 18 who are turned on by sapphic will in most cases still be turned on by it when they are 75. I'd say its appeal is so broad that it doesn't really have a core audience - just most porn consumers in general.
However the core audience for a sites like
Old Fucks Young &
Teens For Cash I would say is much more age specific. I'd expect sign-ups for sites like these from people under 35 to be fairly rare.
HB you might find it useful to study the members' forums (you don't have to join the site to read it) @
Abby Winters
as the site focuses on young ladies aged in the main 18-23.
Abby Winters Forums
You will see members posting there are from many different parts of the world & are straight & bi males of all sorts of ages plus a fair number of straight, bi & lesbian women of various ages.
Let's face it, young women are lovely. Most of us like looking at them

- whether we admit it or not. Lol.