True or false? Supply via private marketplaces (PMPs) is only available to the Amazon DSP managed service users.

This statement is false. While Amazon DSP managed service users certainly have access to private marketplaces (PMPs), self-service users can also access PMP deals. Both managed service and self-service Amazon DSP users can negotiate and execute PMP deals directly with publishers or through third-party exchanges, allowing them to access curated inventory and specific audience segments. The distinction between managed and self-service primarily relates to the level of support and direct campaign management provided by Amazon, not the fundamental access to inventory types like PMPs. Therefore, PMPs are not exclusive to managed service users.