I just had a call from a telemarketer at my private health insurer (don't get me started on being forced to have one) trying to get me to sign up for their "Extras" cover. In case you don't know how this scam works, it's basically where you hand your insurer some more money, and they hand some of it back to you for things like running shoes, glasses and gym membership.
Now to my mind, insurance is all about things you can't budget for. Your house burns down. You get some debilitating and expensive-to-treat illness. I know I need to buy shoes, glasses and gym membership occasionally, and I budget accordingly.
What I've taken to doing with telemarketers who aren't covered by the government's Do Not Call register (like this one, where I am already a customer) is to point out that even if I wanted their product, I would very specifically not purchase it from a telemarketer. Here's hoping some of these places have a "does not respond to telemarketers" flag in their database. Saves both of us time and money.