That's because I don't know. When I first started making MLP art, (about 3 weeks ago) I didn't know how the whole crediting stuff went, and on top of that, I used 2 just type in on Google, "so and so Pony vector", then just save the image, w/o visiting the site. So Many I never got the chance to see who made them. I gave credit the best I could. and I make my own Vectors now anyway, so I wont have that problem anymore.