Hard to admit it because it makes it so easy, but yes Titan has a point. I can't help but find it a little silly that me and some other bloke killed 5 people and earned 1 billion from an event that had little participation. There are rewards I definitely want to save up and obtain, but when you need quick cash selling SD is way better than trading.
However, I think the economy is bad even without SD being involved. It needs a big overhaul. As it stands, making money is too easy, too boring, and the items you spend your cash on are too cheap.