How can a daily deal website track subscribers who reported their email as spam?

The correct answer focuses on the Complaint data view as the means for a daily deal website to effectively track subscribers who have reported their emails as spam. This data view is specifically designed to capture information related to complaints made by recipients, allowing businesses to identify users who have taken the action of marking emails as spam.

By utilizing the Complaint data view, the website can not only access the details of those individuals but also analyze trends or patterns in the complaints. This insight is crucial for maintaining the health of the email list, managing sender reputation, and tailoring communication strategies to minimize future complaints. It informs the website about engagement levels and enables proactive measures to improve email deliverability and relevance.

When considering the other options, while query automations and extracts concerning unsubscribes might provide important information about users who opted out, they do not directly address the specific issue of spam complaints. Similarly, generating a Complaint Tracking Extract could suggest a broader overview of complaints, but querying the Complaint data view provides the most immediate and detailed understanding required in this scenario.