I develop software used by newspapers. This is a problem with the whole industry. It's amazing how much crap they load. These sites all use a third party "tag manager" (Google Tag Manager, Tealium, Piwik etc.) to manage the scripts they load: ads, analytics, trackers etc. The people who use the tag manager typically aren't techies, so they don't understand that adding another tag will cause the page to slow down. Typ…
We have something in the neighborhood of 30+ ad partners. Some of those partners have decent code, others are really terrible. The IT team only adds the code to allow ad networks to inject their advertisements.
Because of the performance issues and the disreputable nature of some of the ad networks we have discussed the possibility of building our own ad server. However this takes time and money, I don't know the ROI of such an endeavor. Ultimately sale's job is to generate revenue so we partner with nearly every single ad network that can generate money. It's not desirable to deal with all these different ad providers, but you don't need me to tell you about the challenges the newspaper industry is dealing with. We need to bring in money on the digital side to make up the downward trajectory of print ads.