I have a few sites that make me money from content locking, each of these sites are pretty much specifically built around a single download im offering. These few sites collectively get nice traffic daily, but are only monetized thru the locker. I do have some random cpa offers sometimes on the websites but they almost never convert, I figure it's because when people reach my site they have one thing in mind, getting the download they are after, so cpa offers even related don't convert. So back to my question, aside from CPA offers, what are some other ways I can monetize my sites along with the lockers that the sites are built around? I have been afraid to mess with anything cuz, I don't want to mess up my existing conversion rates with altering stuff, but at the same time I don't want to feel like I'm leaving money on the table from all this traffic.