I think it's because of the option of renting movies/series on xboxlive that the uk makes up for the largest part. I mean, Im swedish, and my Xboxlive Gold is just a glorified Silver membership. The only real difference between Gold and Silver here is the option to play online, Still, The monthly fee is still pretty much the same as for the UK. The only real reason to sticking with the gold is, for me, the multiplayer.
(sorry for any spelling- and gramatic errors. I am after all swedish:)
