How many CMDR's trade in Computer Components? In essence, it's a fairly low return. So, it's a commodity that is only traded until you can afford a commodity with a higher return. The amount isn't as high as you'd expect, I guess.
Im not 100% but for I think in Quebec they require a grand prize exclusive to their region. Say if I want to give away 1 chocolate bar, if the contest is open in Canada, including Quebec I will need to give away 2 chocolate bars, one to a winner in Quebec, one to a winner from the rest of Canada.
Obviously this doubles the cost of prizes in a contest, hence the exclusion.