Imported Google Group message.
Date:Thursday, 27 November 2014 16:31:21 UTC.
Currently, it's not directly supported, however, you could use the REST API to reset the quota's on the payday for the key and manually reset the seconds countdown.
So you get a payment notification from Paypal, you call the Tyk API to get the key details, you could then modify the key to reset the quota and the quota_renews time to the seconds when you expect the next pay-day and then send the key back to Tyk.
Tyk won't be doing the renewal logic for you (well, it will, and you will keep it in check each time a payment comes in), but it will still enforce the quota's if they go over, which is probably more important for a commercial API.
What do you think?
P.S. If you'd like to see this feature in an upcoming release - or would like to take it on yourself - please raise an issue on the github page so we can track it.