Access previous posts paid after cancellation

Sorry if this has been asked before but I read a lot and didn’t find the info.

1

So here it is:

My site will charge for a monthly subscription, but when a customer stops paying the monthly subscription:

1 – Will stop receiving access to further posts published.
2 – Will be able to access to previous posts “payed”

(there won’t be access for free subscribers)

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2

Do you have any comparing chart of the differences between pro and free version?

Thanks!