I've been whoring points all christmas, i like the system as it makes me want to complete the game fully. Just played through halo 3 on legendary with a friend on co-op and its a good laugh, wish i did it on co-op in the first place!
Plus you can't complain when you see 250G pop up as i completed it on easy at first for the story line lol

Even got all the skulls along the way too, a lot of them were challanging for the points.