If you are avoiding subscriptions, are you doing credit buckets? Up front X months in advance and a reminder to top up?

I find either of these more ethical but it is worth noting that any non-expiring, roll-over credit scheme is going to kill you. All you need is one or two months where you’re focussed on infrastructure instead of fresh content and you will find users get out of the habit of using it up, which can end up with you effectively in debt to your users, who will expect more value the longer they wait.