ANy set availible for download is FREE TO USE.
The problem is when people modify the images or take and use images without first asking. I could care less if any image I have created, gathered, or develed is used by anyone for any purpose. So long as they let me know they are doing it, include a credit if they can, and understand that I want to add their finished set to my ever growing collection.
However, there are a few images that I had to ask permission to use and those images I have specific use terms for. You all understand this, and I thank you for you support.