Have you considered having slides that teachers have refined uploaded back to the system and made available to use? If suggest keeping only the best, you and the refiner could get a royalty. Essentially, attract them with the AI, retain then with traditional curated [teaching] resource sharing?
Does 'use this slideshow but swap the slide about executions for one about fashion' type adaptation work well?
If I adapt a slideshow, can I add it to the prompt so a set of questions is generated from it?