Anyone with a keyboard and internet connection knows where and how to find just about anything. Advertisers will just go where the people are. Quicker, less messy, and costs a lot less.
Commercial real-estate is the next to fall, before advertising. Office vacancy rates are at 14.4% and climbing.
Look at what has happened to home prices with 15% vacancy rates in homes. Commercial real estate is headed off that self-same cliff.
Too much office space...too many shopping malls.