The amount of people working with you in Totango is determined by the plan you selected, and seat add-ons you might have added to your subscription. The indicator located in the Totango Users section provides information on how many seats you have (in other words the maximum amount of Totango users) and how many users are there (so you can track if there is any capacity to add new people)
Location and Structure
The indicator can be found under Settings → User Management → Totango Users:
If you wish to add more seats so you're able to grow your team, please contact us!
Selected customers are able to expand their subscription on their own, refer to this article if you want to learn more: Subscribing for add-ons in-app