When you join a tribe, they become your Trade Alliance, so in addition to building your own tribe, joining other tribes increases your support base.
When you post a poll, wish, pledge, etc., your Trade Alliances will be automatically notified by default. You can remove Trade Alliances from the notification by unchecking the Trade Alliances option in the "Select your audience!" section on the post form. Once that's unchecked, only your Tribe members will receive the notification.
Before you uncheck, remember, posting to your alliances spreads the word about your city far and wide.
Well Street
When you join a tribe, they become your Trade Alliance, so in addition to building your own tribe, joining other tribes increases your support base.
When you post a poll, wish, pledge, etc., your Trade Alliances will be automatically notified by default. You can remove Trade Alliances from the notification by unchecking the Trade Alliances option in the "Select your audience!" section on the post form. Once that's unchecked, only your Tribe members will receive the notification.
Before you uncheck, remember, posting to your alliances spreads the word about your city far and wide.