I've always been a supporter of Duotrope, using it heavily, promoting it when I could, donating money (directly and sometimes asking a story fee be donated anonymously) and diligently reporting all my submissions.
It was a good relationship. I was happy to donate my money and my data to the writing community, hoping that some newbie would benefit, as I benefited when I started out.
Come January that relationship will change, as virtually all the features will go behind a pay wall. That's their decision. And I wish them well as a new business.
But although I'm a frequent user, I won't be using it in future. As a more established writer, I can find the data elsewhere, for free (Ralan.com for instance) or from my twitter feed, or writing groups. For me, the goodwill has gone, and I'm hearing this a lot from my writing friends.
This makes makes a me a little sad. So, I'll leave you with a Duotrope screenshot. The more observant of you, may recognise the story featured.
Money Flow From the Writer at Publisher's Weekly
Duotrope's Facebook page