Village: Bonus Customers is exactly what the name describes – additional customers that can be added to the Village base game. Here's what those customers need in order to be served:
Tile 1: You can take this customer tile for free (you may still have to pay 1 green influence cube and 1 time). At the end of the game, you score 1 prestige point.
Tile 2: Spend a scroll. At the end of the game, you score 1 prestige point for every 2 customer tiles that you own (including this one).
Tile 3: When you serve this customer, you must own the next starting player marker and return it to the council chamber.
At the end of the game, you score 3 prestige points.
Tile 4: Spend a horse and an ox to score 7 prestige points at the end of the game.
For more information: http://boardgamegeek.com/boardgameexpansion/124118/village-customer-expansion