There is a virtual currency in tribe. Community managers can contact customer services in tribe and ask for coins on their account. These coins can be transferred to admin accounts and can be expensed in different ways.
Admins can define a reward for any questions on their community and encourage members to participate and give the best answer to win the coins. At the end of the competition, the coins will be transferred to the winners account.
The coins can be exchanged to real money and transferred to the winners PayPal account, or to things like free tickets for an event, badge, discount for purchases, etc.