Neighbors are facebook friends that have accepted a Neighbor Invitation from you and are now in your Neighbor list.
|1st Neighbor||2nd Neighbor||3rd Neighbor||4th Neighbor||5th+ Neighbor|
The payout curve declines as you visit more and more neighbors, giving you not much for visiting a 5th neighbor or more.
|Town Market||City Market||Royal Market|
There is some evidence that having more than 41 neighbors will actually hinder you finding Camels, instead of making it easier.