Hmm.. or "$x per month of backlog" along with each month of new content. So basic tier of $x/mo gets to see content from the previous ~30 days. But if they stay subscribed, they get to see the upcoming month .. and the month from before they subscribed. Hang out another month, get the next month as it happens and the month 2 steps before subscription for a total of 5. That way staying subscribed slowly opens both past and future in lockstep. Pay for the $2x pro plan? Be getting 2 or 3 months of past content with each new month of future content that elapses.