This tab contains information about all available add-on products for your account. The add-on products are organized in groups that are visible on the left-hand side of the page. The right-hand side of the page contains all of the add-ons that belong to a corresponding product group.
The add-on products that do not belong to any product groups can be found in the default group Other.
All available (not yet assigned to you) add-on products are at the top of the list, and already assigned products are at the bottom of it.
When you sign up for a service via an add-on product which comes with bulk discounts, a dialog box opens that lists all of the available prepay plans. Select the plan which best fits your needs.