New York Magazine has warned advertisers that it will not guarantee privacy unless the ad falls to data limits - currently a maximum of two megabytes for video . Many publishers are using third - party monitors to audit data size , especially as data - hogging ads slow the page load time , spurring publishers to install controversial ad - blockers . In a recent study , out of 25 top websites , ads consume 55 % of the bandwidth , accounting for 54 % of the load time .
New York Magazine has warned advertisers that it will not guarantee viewability unless the ad conforms to data limits - currently a maximum of two megabytes for video. Many publishers are using third-party monitors to audit data size, especially as data-hogging ads slow the page loading time, spurring users to install controversial ad-blockers. In a recent study, out of 25 top websites, ads used 55% of the bandwidth, accounting for 54% of the load time.