This is why everything is "software as a service" now: you can lock you customers in on long term contracts billed per seat, rather than having to make a good product that people like to use
Let's be clear: all the AI in edtech stuff (Canvas, Blackboard, Grammarly, Duolingo, OpenAI, the rest) is all about the "lock-in" - locking in students as subscribers or institutions via long-term license agreements for value generation. Is there good pedagogic evidence for it? No.