If you have looked closely at the prices for the Fiber Club (and I hope you have!) you may have wondered about the differences in prices for shipments to the US and within Canada.
These differences reflect the fact that, on average, it costs Sheepspot about $2 more to ship 100 grams of something within Canada than to the US. Strange, but true. (If it seems to you that this fact is in conflict with Canada Post's obligation to serve Canadians, I entirely agree with you.) So that's why the basic club membership costs Canadians more.
On the other hand, when shipping 200 grams to the US, the price goes up. Again, the difference is about two dollars. But the price within Canada generally doesn't increase. This is why the prices for extra fiber are lower for Canadians.
Hope this helps.