That depends.
When you subscribe a client to a plan, they receive access for 3 users on the account, , alongside you, at no extra cost. If the client adds users within this limit, they can freely add new ones.
For any additional users beyond the first three, there is a charge of $10 per user per month. If the client attempts to add more than 3 users, they’ll receive a notification instructing them to contact you for further assistance.