Hi Jonathan,
thank you very much for your detailed reply. I thought it would be a complicated story with quite a bit of industry evolution mixed into it. I realized how widespread the sublicensing is when I once did a search on corbis and found my own files from getty, not all of them , just a selection it seems. After that I paid more attention and was amazed how widespread the phenomenen is.
I like to look at many different agencies before I plan a shoot, so that hopefully I can spot what is missing or what I could do differently so that although my files are simple, they will still stand out. And if my files will be sent out to so many more places than I thought, I hope it is a good strategy.