said by BucknRusty:So if I go to www.nytimes.com and when I opened it up there was an EHarmony and Starbucks ad on the page. Those are advirtisements and I bet NY Times was paid for it being on their web page. The amount of data that sent to me was tiny, yet it would be a cost if I were on metered billing. No ad blocker is going to stop that "ad" from being on the websites primary page.
In almost all cases, those ads would be blocked. Very few ads are actually served up from the primary site you are going to. Most are served up by 3rd party ad farms and are linked to from the main web page and not actually served from the main web pages web site.