FAFSA.com may be an "approved" fee-based alternative, but they do implement some shady practices. For one, there is no price list at the beginning to let users know that the service is not free. Users wont be alerted that the service costs upwards of $100 until they have already invested their time and sensitive personal information. This is what is called a bait and switch. Secondly, for those who may have accidentally started on fafsa.com instead of fafsa.ed.gov, there is no way to delete your account and remove your private information from their database.
Most legitimate businesses are transparent in what they offer and what it will cost the user. If fafsa.com's service is indeed valuable and in demand, there would be no reason to hide the costs from the user. And if fafsa.com was indeed confident that users would find their site helpful, there would be no reason to make it impossible to remove sensitive data and close their account.