Obviously telemarketing works; otherwise companies wouldn't use it. If one fish out of 100 bites, then you still make a profit, right?
Actually, one time a couple of years ago, I didn't really buy from a telemarketer, but I "agreed to a free trial period" in a vacation club. Hey, I was still in bed when they called and I was tired as hell, so I wasn't really thinking. They said if I accepted their "no obligation trial offer" I would recieve all this free gasoline. I never recieved any free trial package, and one month later a $69 charge appeared on my credit card. I immediately called them to tell them that they never sent me a free trial, so I want my money refunded. They tried to wiesel their way out of it, but eventually they told me they'd refund my money and it would appear as a credit on my card "within 2 billing cycles". Realizing that this was exactly the amount of time I had to dispute the charges with the credit card company, I notified the credit card company. The charge was taken off almost immediately. To this date, I have never recieved my free gas.
Last year 1,944 New Yorkers saw something and said something.