I've seen this on multiple sites - even hosted a few games myself. We were thinking of doing trivias like this, although we don't yet have enough deltas in the bank to be giving them out as prizes! As soon as we do, our Events Committee will have wonderful ideas in store for delta prizes, but for now we may stick with poses, rooms, (things that don't cost the site much), etc. This is a wonderful suggestion though, thank you very much for your input!