Discount For Subscribers

Hi there,

We have members that are signing up as subscription members through stripe, billed month to month. We have a “rewards dollar” program that we use that they can apply to get free months etc etc. How would we offer them discounts on existing subscriptions without having to cancel and restart and recollect their credit card information?

Example: You are month to month and have been with us for 6 months. Each month is $10. You have $10 in rewards bucks so we want to give them next month free but continue to charge them in month 8 going forward.

https://wordpress.org/plugins/s2member/