The effect is not necessarily a game-winner, but a nice thing to have at times. There can be up to three Land Shares in a hex at three different corners as long as they will fit. There are no victory points awarded for building or having a Land Share. Effect A player who has a Land Share will draw one resource card of that type at the end of his turn, every turn. Whether the land share is controlled by a city or a settlement, the draw is still only one card from a Land Share.
Production continues normally otherwise.
If an opponent builds a Land Share in a hex that contains another player's Land Share, the opponent may decide to either block Land Share production for that hex or allow mutual Land Share production. Thereafter each player decides whether to block or produce at the beginning of his turn. The blocking player places a blocking token on his land share to indicate a block. Blocking tokens may accumulate, but a player may elect to remove only one token per turn. If a player holds a majority of Land Shares in a particular hex, he may use one or both of his Land Shares to remove a blocking token from any Land Share on that hex.