yes, well i do agree it is a nice gesture.. i don't think, however i feel that nice to help others sales go up and mine down.
I think it is a really interesting (and nice) concept in micro stock photography how helpful people are to others, and this is a pretty good example, that there are probably people out there keywording other people images as we speak. In the old days of macro stock photography (not that i'm speaking from experience mind you) there seemed to be a little more cut throat competition and hidin trade secrets.