So many people/companies plead poverty. I charged a relative pittance for my photos despite fronting the costs of driving to and from the site 200+ Kms away, spending 2-3 days there, and housing/feeding myself, working through 8+ hour days, then spending days editing and posting the results. I found a real estate guy using my shots in his newsletter. A "charity calendar" (in reality being sold to defray costs of attending events) being produced with shots from myself, and several other photographers. One commercial website had dozens of my pictures, used in their after event newsletter and advertising. None had so much as emailed me to ask for use. I had to find this stuff, myself, and that's just the ones I remember off the top of my head.
The worst was a family who had a young daughter competing in the events, who was an up-and-comer in the sport. I gave them access to the site so that they could download full sized images, instead of the downsized ones I provided under Creative Commons license, with the strict understanding that they were for personal use only. I found them used in a magazine that I frequently sold images to, for publication. I cut their access immediately. That they never bothered to ask why their access was gone, the next several times I saw them on-site, told me everything that I needed to know.