How do you get paid?

This snippet from a long article by Bob Garfield on the coming end of advertising as we know it, is worth at least a short ponder:
“… listen carefully to Jan Leth, executive creative director of OgilvyInteractive North America, as he tells a funny little story about an agency assignment for Six Flags.
‘They had a promotion for their 45th anniversary. They wanted to give away 45,000 tickets for opening day to drive traffic. So we got a brief to do whatever: ads, microsite, whatever. But our interactive creative director just went off and posted it on Craigslist. Five hours later, 45,000 tickets were spoken for.’
‘No photo shoot. No after-shoot drinks at Shutters,’ he adds, with faux regret. Then, with somewhat less irony: ‘Now, the trick is, how do you get paid?'”