Each Co-op mission offers experience points, coins, and a prize that can be placed on your farm.
The number of XP, coins and the specific prize are dependent on which co-op job is completed, as well as the amount of time taken. The Gold and Silver medal levels receive more XP and coins. Special prizes are awarded to Gold Medal winners only.
All members of the Co-op get the same reward even if they do not contribute, and regardless of the number of members. A maximum of 10 neighbors may become members of any Co-op and a member must wait for the Co-op to be completed, or quit the Co-op, before that person can start or join another.