They weren't advertising with it, the article mentions they did ask for permission before doing that. As-is all I'm aware of Crocs doing is taking an image that was published and willingly tagged to their brand and putting it in a public collection of similar photos. If I posted a picture of myself on every bulletin board I could find posing with [popular_brand] and labeled it with a big, flashing sign that said '[brand] LOOK HERE', is it unreasonable for that brand to share my image on their website? I don't think so.