Cc-by-sa plus main page attention is a very good reward for professional
photographers, particularly if they get dual FP status on Commons and
en:Wikipedia. I wrote an article about this for a business publication a
few months ago where I crunched the Alexa numbers and concluded that a day
on that main page is considerably more valuable than below the fold
placement on the front page of The New York Times.
For the most part, the people we're trying to reach:
A. Don't realize this is an opportunity.
B. Are in the habit of retaining full copyright.
My argument was that judicious relicensing can be a very smart move for
portfolio material that no longer generates revenue streams, particularly in
terms of generating viral links and incoming traffic to the photographer's
website.
I wouldn't mind writing up a photographer-specific variation on that article
for a photography magazine. My e-mail is enabled; mail me an editor's name
if you know one.
-Durova