Glut ad infinitum

Martin Peers, in the the Wall Street Journal, picks up the thread on the glut of potential ad space with this great lede:

What does the Internet display-ad market have in common with Zimbabwe?

Both are printing nearly-limitless amounts of their main currency, vastly diminishing its value and undermining their future. The currency, for Web sites, is their ad inventory. And while Zimbabwe, under different management, can change course, the same isn’t true of the display-ad market. Web sites keep generating new content and extra pages on which ads can run.

More thoughts on the advertising inventory glut here.