I discovered today that a major media site which allows their writers to post articles is starting to accumulate backlinks to my website. The writes are taking images and linking to the page on my site where they found them. The links are all nofollow, and I haven't gotten any traffic at all from the links. Considering that it doesn't provide traffic or link value, but the images may actually outrank my own in Google Images because the site is so powerful, is there any merit in allowing the images and links to stay in place?