This feature is available only to existing paid customers and is not for sale to new customers.
Before you can create a task that uses the Media Backflow feature, you must authorize and purchase a Media Backflow resource package.
Both authorization and purchase must be completed by the Alibaba Cloud account that was used to purchase Quick Audience.
Resource Package Authorization
Follow these steps:
Log on to the Quick Audience console with your root account and click Resource Package Authorization.
NoteYou only need to authorize the resource package once. The authorization applies to all types of resource packages. If you have already authorized the resource package, the Resource Package Authorization button is not displayed.

In the dialog box that appears, click Agree to Authorization to complete the authorization, as shown in the following figure.

After authorization, Quick Audience can retrieve and view your resource package purchase records. For more information, see Quick Audience Service-linked Role (Resource Package Authorization).
Media Backflow Resource Package Purchase
Follow these steps:
Use your root account to click the resource package purchase link and go to the purchase page.
Select Media Backflow and the number of records for the resource package. This number specifies the quantity of ad click tracking data records for media backflow. Click Buy Now to complete the purchase.
NoteRead the sales rules for the resource package on the page carefully.