If you review the terms of service, you should only being using that manual for 24 hours and they may have used your information when getting the info from Kia.I think it’s worth it for me since I keep vehicles for a good while. More valuable to me the older the vehicle gets. The manual I purchased is in a pdf format. Looks like it was derived from the proprietary manual used by dealers. Not too bad.
Review section B 6 on this page: Terms&Conditions