Comscore numbers vary wildly for sites that don't reconcile their numbers w/ comscore's. And only sites that publish rate cards for displa ads really do that.

Comscore numbers vary wildly for sites that don't reconcile their numbers w/ comscore's. And only sites that publish rate cards for displa ads really do that. I remember once when comscore reported that delicious had dropped to 44k uniques when we had millions of actives, much less uniques.