Channel Membership feature request: Hide post history unless member is actively subscribed

I'd like to see a feature for channel memberships where we can hide the post history on forum-style channels unless the member is actively subscribed during that timeframe.

For example, I'd like to be able to offer perks for current members (for example, video tutorials or free downloads), but I don't want someone to be able to subscribe for one month and then access everything in the collection.