I'm surprised more companies don't already use a CNAME to serve external ads. Then again, ad networks are loath to have clients touch their source in any way,

I'm surprised more companies don't already use a CNAME to serve external ads. Then again, ad networks are loath to have clients touch their source in any way, so it would have to come from their side, and they don't care about that kind of stuff. Interesting to see this publicized by the NYT. Maybe they're showing off how independent their editorial is from their business side.