Or just cap the tournament at 8, thats what i did with the last one I did. 10 is ridiculous, shouldnt even be allowed to play with 10. No offense to aladdin or ren, but both of them won exactly 1 match apiece and they finished silver and bronze, respectively; that shouldnt happen.
Well yeah that's one solution, but it means less players can get involved, i'd rather have a system that allows any even number of players to compete.
I've seen a few 16 player Tournaments before, not often but it does happen.