IMDb is an example of which type of supply source?
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Correct answer: AmazonO&O properties.
Why this is the answer
IMDb is an Amazon-owned and operated (O&O) property. Amazon O&O properties are websites and applications directly owned and controlled by Amazon, where Amazon DSP can serve ads. This allows for direct access to inventory and often proprietary audience insights. Amazon Publisher Services (APS) is a suite of services for publishers to monetize their content, but IMDb is not merely a publisher using APS; it is owned by Amazon. Third-party exchanges are independent ad marketplaces where various publishers sell ad inventory, which is distinct from Amazon's directly owned properties.
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