> Nobody wants to host ad content / pay for the bandwidth themselves though. Actually the issue is that the companies paying you to run the ads don't want you

> Nobody wants to host ad content / pay for the bandwidth themselves though. Actually the issue is that the companies paying you to run the ads don't want you to host it yourself. * They're paying for impressions, and they don't trust you to report those honestly. * Real time bidding means the ad to be displayed often hasn't been determined until a few milliseconds before the page loads in your browser. * They can't (as easily and reliably) collect demographic and behavioral data (ie spy on you) if you don't contact their servers directly.