"send_paywalled_preview" value is missing

[suhan1996]

          Great!

One thing for it to work:
"send_paywalled_preview" value is missing, so currently there's no emails sent out to non-paid members if the paywall is added, which is essentially the main reason for this feature (send preview version to non-paid members).

Originally posted by @suhan1996 in #22 (comment)