That's to protect the broker, not the company. They don't want you to bypass them.
Think about it: I have this company for sale but I won't tell you which one it is until you sign this document.
What's is there to lose for the company to have its name spread to those that might be interested?
It's not like they're advertising the name in the NYT or making it public other than on a one-to-one basis with leads and those leads are definitely not going to publish the name if they're really interested because the last thing they need is more interest from others.