IDX Broker allows development partners to disable the upgrade center for clients so that billing changes aren't applied outside the notice of the billable party.
To enable this option, log in to your partner dashboard and navigate to Account -> Billing ->Add Edit Billing
Near the bottom of this page is a radio button that allows you to turn on or off the billing control.
Be sure to save any changes made before leaving this page.
When this is enabled, clients will not have the option to change the billing information, or to have access to the upgrade center. This ensures that you have and maintain control over the billing for your clients.