Charging for AI features is not appealing. Most people are already paying you & for an AI service they are not going to want to be paying for AI service them be required to double pay you. Just for you to consider you guys should be displaying and providing your AI as the best, a creative & authoritative AI that provides high level understand and research of your pdfs and documents in a better way then other included in the adobe suite, will draw people to you. Look at what google has done. (think if when they had the original decision to charge for search again if they would have ...)