How did you do it last time, Mike, are participants allowed to offer a prize (for 4th thru Xth place depending on how many prizes are contributed)?
In the past editions of Green Eggs and Ham grading contest, we had a good time picking prizes in a separate thread, and the variety of contributions and diff't tastes even added an element of suspense and some surprise on occasion. Nobody was ever required to contribute a book to enter the contest, but it always turned out that many had something to throw in at least worthy of the cost of shipping, and occasional 'Uncle Pennybags' members would give a few items, so most/all got a chance to pick a 'prize.' [though on principle I'm not a participation trophy person, this always seemed different]