Paypal's behavior on failed/missing payment of Subscription

问题

I am working on a Website or can say a Payment Portal in which users can Subscribe some of services using Paypal Subscription, and administrator can manage all Subscriptions,

I am using Paypal Subscription API for this, which documented here: https://developer.paypal.com/docs/api/subscriptions/v1/

All is going well, but confused with a thing like:

Suppose there is a Subscription Profile with 12 Monthly Cycle, So it will charge customer every month, Suppose first 2 payments charged successfully, but 3rd payment is missed/failed due to any reason, then how and when Paypal try to collect this missed payment, and if all failed attempt what will be the status of Subscription, if Subscription Plan have:

1) payment_failure_threshold is 0,

2) payment_failure_threshold is 1,

3) payment_failure_threshold is 2,

I checked about payment_failure_threshold

I checked on Paypal about this case here https://developer.paypal.com/docs/classic/paypal-payments-standard/integration-guide/reattempt-failed-payment/

But it does not state about payment_failure_threshold.

API documentation said this about payment_failure_threshold:

But I still confused with the different values of payment_failure_threshold.

Please help me to find out the behavior of failed payment retry with its different values. Explanation via some example with date (when and how much time Paypal will retry, and on all failed attempt what will be the status of Subscription) will helpful for me,

Thanks

EDIT: I asked a question at Paypal Merchant Technical Support about Missing Payment Retry Process, So first, they answered this:

Then I gave referenced of this link, then they guys answered this:

And it's almost a month, and they didn't update their docs.

回答1:

Saw this on Paypal Developer Documentation:

PayPal reattempts a recurring payment three days after the recurring payment failed. If this first reattempt fails, PayPal waits 5 days to reattempt a second time. If the second reattempt fails, PayPal cancels the subscription.

来源：https://stackoverflow.com/questions/57727814/paypals-behavior-on-failed-missing-payment-of-subscription