That is correct. To the best of our knowledge no one won. If someone did win then Tapas didn't take any steps to announce it. About two weeks after the contest, those who participated had to put pressure on staff on the forums about when they would get an answer. As far as we know, everyone received a semi form rejection letter in two fonts. Font one was the automatic stuff and font two was the judge's critique. We lost because our story "isn't a good fit for Tapas genre-wise."
In a round about way there was one winner. The Boy Princess began because of the contest and it generated enough subs over the following months that eventually staff promoted it to Premium.
Because of the missteps of that event that is why you now see the prize amount 4x larger and a set date that the winners will be announced, May 1.
Still there is definitely room for improvement.