I didn't win 300 euros but thanks to Jacques Urbanska for including a GIF of mine in the exhibition portion of the Transnumeriques Awards 2015, part of the Videoformes Festival in Clermont Ferrand, France (March 19-21, 2015).
Three of the artists included in the curated portions won the prizes: Benjamin Rosenthal, Haydi Roket, and Nicolas Boillot.
The curated GIFs were exhibited on 5 monitors. Urbanska told me in an email that "it was great [during the exhibition's three-day run] to discuss with the public, spread artists and their works (netart projects, hacktivism...)" The winners, he said, had their work projected on a large cinema screen at the awards ceremony.
The original call for public entries page includes some GIF articles and links to a compendium of artists' websites.