Capturing player's workers.
Attacking the main city, when you attack and take their resources, a suggestion would be, capturing certain amount of the workers from their city and adds to your city. Think of it this way, you are raiding on a player's city, and all you take is resources, why not capture some workers along so that they can be in your city.
*Note: If you are maxed on workers, the workers you capture is set free.
Server 27 - Bechardii (VIP)