One tip that is not covered: If the user already has the app installed, right on top show some message like, "you can only read 2 more exclusive articles this m

One tip that is not covered: If the user already has the app installed, right on top show some message like, "you can only read 2 more exclusive articles this month", which expands to some marketing speak and option to pay $50. This will make the user immediately run for their wallet and subscribe. I just noticed that Medium has this down.