A good rule of thumb for programmatic ad cost: the more niche your audience, the higher CPM you will pay. Www servers, serving dynamic content, waiting for slow responses coming from back-end computer(s) (e.g. databases), maybe because of too many queries mixed with too many inserts or updates of DB https://josueglmkh.win-blog.com/7903555/5-einfache-fragen-Über-werbeplattform-beschrieben