YEAH, the PJM ad-network model isn’t working. I don’t have much to do with the PJM business side, but online ads just aren’t producing revenue like they were a few years ago, and the blog-network thing was apparently a tough sell. Hence the emphasis on PJTV. How will that work out? Stay tuned.

UPDATE: Thoughts from longtime PJM critic Ann Althouse.

MORE: Further thoughts from The Anchoress. And more at Protein Wisdom.

STILL MORE: Roger Simon: “We disbanded the ad network part of our business for a simple reason: it was losing money and we couldn’t see how in the reasonable future that would change.”

MORE STILL: Some business points from Tim Oren, including this one: “Anyone who’s paid attention knows that the effective CPM for both click-through and exposure ads on blogs s***s. I mean really s***s – like up to an order of magnitude less than run-of-site ads on big, topically diffuse web properties.”

FINALLY: Bob Owens reminds people that it’s just the ad network that’s ending in April, not Pajamas Media.