Original OP here. No, that's not necessarily true. If that was the case I wouldn't really have this problem. Last year I saw a couple of main giftfics with author notes along the lines of "I saw you were into Yuleporn as well, so here's something smutty for you!"

So it could very well end up being for more than just treats. And I don't think you should assume your assigned writer won't see the Yuleporn post.