Can I clear something up. 'Royalty free' doesn't mean that you can use an image without paying for it, It is in fact a license model that is becoming less popular. Some of my images are 'royalty free' on Alamy, it just means that the user can use the image without making specific conditions of use with Alamy. You used to get more money from a 'royalty free' use than a 'rights managed' use, but nowadays in order to sell an image 'royalty free' you have to have model and property releases to go with the image that you didn't need in the past, hence why its becoming a less popular licensing route with photographers as well as agencies.