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The correct answer is: Paid features

Explanation: The Paid features panel provides access to additional subscription-based insights from Amazon or third parties. These insights can be joined with the Amazon Ads events already available in AMC, enabling enhanced analytics and measurement capabilities.

Reference content: From the official Amazon documentation (AMC data sources overview):

“In addition, AMC also supports for your subscriptions through Paid Features. You can also upload your own datasets.”

Further, the AMC paid features section lists all the available paid feature tables and states:

“The following tables contain signals associated with AMC paid features. For more information about availability and eligibility, refer to Paid features overview.”

Section: Amazon Ads Advanced Tools Center >> Data Sources: AMC Paid features >> Paid feature tables and third-party data integration in AMC