They aren't obligated to credit anybody...
since SS isn't the copyright holder.
well, actually it would be nice to start having everyone be credited . after all, given that microstock pays so little , a credit line would be the least anyone who downloads our word should do.
i recall long time ago when fotolia actually not only had downloaders credit you with both fotolia and the owner's name by the side of the photo used. but also have infos of who the downloader was , available to us.
then they stopped doing that because some goofball(s) contacted the clients directly, and became an annoyance to the clients...(or so the story went ).
if u take it that high paying photograph works like Pirelli credit their photographers,
one would think crumbs microstock-er should indeed be credited, don't you think?