I'm not really in favor of giving extra points to Open Source stuff, because then it will not be a clean win when the Open Source entries will dust the floor with the Closed Source entries - people will say "they just won because they're open source, but actually the closed source stuff was better".
I'd still rather have a compo that only allows open source entries (like the original rules said), but if there's a consensus to allow both and "stimulate" open source by having bigger prizes for them, that's OK for me - I would (somewhat reluctantly) participate in that.