Getting listed with free content

[Jonno]

I am still very new to the business but I have been having some good success getting listed at LL's using free content from my sponsor. However there are some that are not listing me and I'm not getting any clues back from them why they refuse me. I'm wondering if I'm not getting listed at these sites because I don't have any purchased content. I don't think that the free content I have is overused, but maybe LL owners prefer to list sites that have bought content. I don't have a problem buying content but I have been using the free content because I want it to directly represent the sponsor I'm promoting (preferably using models that surfers will find on the site) and I can't really do this with purchased content. Am I being stupid trying to do this?. Does it make any difference if surfers find totally different models when they get to the sponsor site?. Could this use of free content be why I am getting listed at some big LL's but not at others.
Thanks for any help you can give me it is really appreciated.