Ah, I think there’s a slight misunderstanding, haha. What I meant was: will there only be one winner overall, or can there be multiple winners, but each winner only gets one prize?
The comment about “encouraging fanartists to participate” makes more sense if you interpret it as meaning there can be multiple winners (each with one entry), but you could interpret “one winner one work selected” as meaning there will only be one winner.
Hopefully that’s a bit more clear.