Yes, they offer a money back guarantee that they won't sell your name, number, email address and job function to others! Unfortunately, since you didn't pay anything to get that 'free' whitepaper, that guarantee is worthless.
When I asked Whitepapers Weekly to put me on their 'Do Not Call List', I think I succeeded. Unfortunately, without asking me, they then sold my name and number to many other spammers, and now I can't answer my work phone number as I get at least a dozen spam calls a day.
Do not give these people any information that you do not want sold to the business spamming world.
They called yesterday. Caller ID says "BELVDR/TIBRN CA" whatever that means. They were looking for our IT Manager. I told them you have the wrong department. It sounded like they wanted to make a sale or something.