Doesn't that kind of make it more social in a sense? Instead of being restricted to the groups of people in your town that collect, you can now talk and trade with people half way around the world.
I come from a small town. My friend and I are the only ones that I know of that collect cards. There is a small shop 30 minutes away that sells cards, but usually we are the only two that buys hockey cards. Every now and then there will be 3 or 4 packs missing that we didn't buy but its a very small amount. Without the internet (mainly this site), I have been able to easily increase my collections 10 fold.