I guess it must work, or they wouldn't keep doing it, but why would anyone entertain a cold caller to any degree? In my experience there's a 0% chance it will be useful or a good deal, and a very high likelyhood it's an outright scam.
I do think it's good to be polite to anyone who calls, but it doesn't matter what they say or ask, the answer is always a polite "Please don't call me again."
I do think it's good to be polite to anyone who calls, but it doesn't matter what they say or ask, the answer is always a polite "Please don't call me again."