Pro here, but only because it "pays off", sorta. I use it as an advertising outlet (like you're not supposed to) as a place to upload my photo's of fabric I've printed with SpoonFlower and connect with other SpoonFlower artists. As a general, just-upload-your-c***, image site, I use Photobucket as it has some of the best space limits. Without a Pro on Flickr, you're limited to 200 photo's, Photobucket gives you a limit based on your file sizes.