I know who Future US is. They are a magazine publisher. Guess they're calling because I let my "Maximum PC" expire. They also do a Mac magazine, which goes better with my current computer.
This afternoon I was called (again) and I finally decided to pick up the phone and ask them to stop calling. When I did, I said hello, and whoever was on the other end of the line hung up. I won't bother picking up the phone if they call again.