Could you possibly move your more personal/family pics to a new address and let Getty have full access to the old one? And yes, I would be a little hesitant to let them have all files. I know a preacher dude that got a free family portrait. The catch was the photographer was giving one of these companies access to all their shots. Next thing you know, the family pics are being used all over the net for various reasons/businesses. He had no idea how the pictures would be used and would never do another "free" family portrait again.