Check these terms in advance so that there are no hard feelings later. Included within the body of the usage agreement is often a reference to the company's privacy policy. Again, this is something worth taking the time to read. It may mention that the ISP's policy to share aggregate information to prospective advertisers. This means that user data are grouped into categories so that the ISP can reveal demographic information about their subscribers.
Advertisers require user information to target their messages to reach the right audience.
So while most users accept that aggregate information may be shared, they would certainly not enjoy having their specific or individual information shared, lent, or sold to third parties without their knowledge and permission. Every word in the agreement has been placed there for a reason. Since the FISP does not allow you to propose your own language, you have the right to accept or refuse their offer. Take advantage of your right to review the language and don't agree to anything you do not understand. You may always request am explanation about a particular clause or section.