Subscription model
This is easy to answer,
The flat rate $10 per month gets you instantaneous 'flat' edition. Looks the same - but no interactivity or video.
Premium gets you embedded video and clickable articles for more depth coverage plus the ability to save articles in some sort of filed binder.
Hence similar content with those willing to pay more getting the 'unlocked' version. If the content is good enough people will pay to unlock. Or you make articles unlockable for micro payments that add up over time to more than the premium subscription that way the decision is graduated not 10 or 30 bucks
This is easy to answer,
The flat rate $10 per month gets you instantaneous 'flat' edition. Looks the same - but no interactivity or video.
Premium gets you embedded video and clickable articles for more depth coverage plus the ability to save articles in some sort of filed binder.
Hence similar content with those willing to pay more getting the 'unlocked' version. If the content is good enough people will pay to unlock. Or you make articles unlockable for micro payments that add up over time to more than the premium subscription that way the decision is graduated not 10 or 30 bucks