Masked Reviewer ID: Assigned_Reviewer_1
Review:

Overall Rating
Accept

Relevancy
Relevant for more than 50 WWW participants

Interestingness
Everyone will be discussing at the poster

Originality
How I wish I had thought of that

Technical Soundness
Most parts sound correct

Ranking Rank
above 75% of my pile

Detailed Comments
The authors discuss methods to reverse-engineer certain aspects of ad-serving systems, such as location-based ad-serving algorithms, and behavioral targeting. The problem is very interesting, as are the results. The poster version appears to be the subset of the research-paper version that most previous reviewers found interesting.