"When you order your free report here, you will begin your free trial membership in Triple AdvantageSM Credit Monitoring. If you don't cancel your membership within the 7-day trial period, you will be billed $14.95 for each month that you continue your membership."
For a truly free credit report, use annualcreditreport.com. This site is recommended by Federal Trade Commission.
Remember, according to federal law you are entitled to a free credit report each year from the three credit reporting agencies (Experian, Equifax, and TransUnion). For additional information, please see this FAQ from the Federal Trade Commission.