You can unsubscribe from any Paystack mailing list by simply scrolling to the bottom of the latest marketing email you received from Paystack and clicking 'Unsubscribe'.
The bottom of the email should look like this:
Once you click on unsubscribe, there's one more step left. You'll be redirected to a page where you can simply unsubscribe from a particular mailing list or from all mailing lists.
The page should look like this:
Once you unsubscribe from the list and you won't receive the emails anymore. However, you can revisit the same page to subscribe again if you ever want to start receiving the emails again.