I completed my enrollment committment and kept getting letters from them saying that I hadn't and that I must spend another $22 or $23 or they would just charge it to me. I kept e-mailing them asking for details as I had purchased other books after the introductory package. Finally I got an e-mail response that said the last book I purchased cost $12.98 and to qualify for meeting the requirement, it needed to cost $12.99. I responded to that e-mail and offered to give them the extra penny. Then I got a letter from a collection agency.
I never read anywhere that a book had to cost that amount or more, otherwise I could have easily done it. VERY DECEPTIVE COMPANY.