I don't agree that ACSOI makes sense. Marketing isn't just the initial customer acquisition cost. It's also a substantial expense that keeps existing customers active, engaged and profitable. If it was just about customer acquisition then we'd never see an ad for Tylonel, Coke or Budweiser.

Fortunately Groupon is issuing a new S-1 tomorrow, so it's likely that those who are looking for more information will get it.