"...if he posts about mature women, rather than sending someone reading his blog entry to a mature sponsor, he'll actually send that reader to a free site or a link list that he owns, where the reader can then decide which of his sponsors they want to signup for..."

You're just delaying the inevitable. If you want him to buy something, don't make him jump through hoops or you'll lose him. If you're writing about mature women, he'll only click if he wants to see more of the same. If you re-direct him to something other than what he thinks he's clicking, he'll no longer trust you.