The CPM gap

Ads online typically cost $5 to $20 for one thousand impressions. A fancy magazine might cost two or three times that. But it's still pennies a person.

Attending a conference, on the other hand, costs $1000 by the time you add up the expenses. That's a CPM of $1,000,000. One thousand of the right people at the right conference costs a million dollars, as opposed to $12 for the same thousand people online.

That seems nuts. Same people, radical difference in price. Apples and oranges. It's not a val