It sounds like all of the finalists' submissions were similarly composed images, featuring layers and collage techniques. So at least the winner was chosen from among similarly styled and composed pieces.
But that isn't exactly a photo competition then. Call it a "digital art" contest or something.
Exactly, it's digital art and judged by some crew of artists, with a final vote by online poll. Totally incredible and absurd! The wine and cheese crowd with their little caps and scarfs will be pleased by this as Avant-garde and groundbreaking work. The rest of us will see it as a pile of meaningless dung. Fun, frivolous, experimental and creative, but winning a photo contest. what?