Paid Newsletter or Paywall block: All free trials or access before paying

### Impacted plugin

Jetpack

### What

Allowing non-paying readers to read paid newsletter for free in a limited number of time.

### How

Memberpress plugin does this, and I think it would benefit to have the same.

https://www.wpbeginner.com/wp-tutorials/how-to-create-a-paywall-in-wordpress/#:~:text=Giving%20Non%2DMembers%20a%20Limited%20Number%20of%20Free%20Views

The issue names the Jetpack plugin and links to a MemberPress paywall example; start by locating Jetpack’s paid-newsletter or paywall entry point and reviewing that reference. Done should mean non-paying readers receive limited free access to paid newsletters, followed by a payment requirement.

Written by the indexing model from the issue text.