Several years ago I created the little graphic ufo you see here. It’s actually a file from coreldraw like 2.0 or so. I took the image, put a little colored blur on the lights, made them rotate with using gifanimator and then published it on my site.
A couple years ago I saw the image posted on someone’s website. Turns out they purchased it on a shareware images cd from a computer show for $20 with a compilation of “royalty free graphics”. Thing is I never gave anyone permission to distribute my image and in fact I probably couldn’t as it’s not really ‘my’ image. How’d I know it was mine? The gif comments in the image shows it was created with the trial version of gif animator (same trial I used in fact) and it was the same small section animated.