As a freesite builder, I always use purchased content, so the model they see on my site is not the model they will get at the paysite. Unless it's a single model site, if the content is relevant to the niche, I don't see any problem with that.
Having said that - with this site, the text suggests to me that I WOULD see this model at the paysite, which could cause some problems. I am always careful about what text I use to promote a site & try to use content that reflects the models they will see.
There's another thread about this type of thing
here
Ponygirl