It looks like this shows where each account was originally created from. So new accounts can get around it, but all existing accounts that didn't have the foresight to be using a VPN from the start are now burned.

Going forward this is going to be a bit of a cat-and-mouse game. There are plenty of other tricks X can do to determine country of origin. Long term I agree the sock puppets have the upper hand here, though forcing them to go through the effort is probably a good thing.