[Reelin]

> 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.

[strbean]

True! More (and more important) reasons why URL blacklisting will continue to work in the WASMy browser-in-browser age.