Membership is free so no one's really been taken. Just given a relatively worthless membership with weak promises attached.
There have been a few minor benefits to it. The Putting CTTH Challenge was opened to Nation members a month before it was available to all other members. Currently there is a Green vapor ball that will be given to Nation members who play on St. Patrick's Day but it is not practical to use it in any serious round. You can't buy one to back it up in your bag if you lose it in a game. You'd have to finish with a starter ball.