The document discusses two strategies for mobile organizing: hub and spokes and network.
The hub and spokes strategy involves a central organizing group that controls the recipients, message, and timing of SMS messages. It allows for control but is expensive and requires building a contact list.
The network strategy utilizes activists as organizers who spread messages through their own networks. It has lower costs since it is distributed, does not require a contact list, and messages can be re-broadcast. However, there is less control over recipients and messages.