Hmm, i see your point, but i still don't believe it's the way to go.
Advertising in highly populated areas would create an influx the current DC's could not handle, which means unhappy city folk.
Right now, i believe, the DC's could handle a lot more people than what we are currently serving, so wide-spread advertising is needed. The DC's would be bombarded, which is good... that would mean more subscriptions, period. Yes, some people would be unhappy, but when isn't that the fact. You could have an efficiently running business, but you would still have someone pissing and moaning about something... that's the American Way. LOL. ¦¬)