Call Centers (Out Bound) , spam mails , SMS Marketing, all push marketing techniques are going to have nature death. Its found when needed matters & not found every now & then on every channel and medium.(its truly disturbing and killing BRANDS)
People have enough choices of getting what they want courtesy google , face book, face book friends, linkedin connects & likes and Just Dial kind of networks. Work on existing customers and they will freely become your brand ambassadors. But who cares once the transaction is over???
Marketeers have to innovate , innovate by creative destruction. What once used to or every one else is doing is BORING & Brand Killers.