This is low priority, but worth mentioning.
The cron logs are full of requests that look like this, every minute:
Requesting GET api.stripe.com/v1/customers/cus_XXXX
It takes 1/4 of a minute for the requests to complete. So we only need to grow for a factor of 4 before we overflow the 'every minute' and find ourselves constantly doing stripe requests.
This suggests to me that we are sending a request to stripe for every customer? I think we should try and find a more effective way of doing this, or lower the rate. It may be more efficient to do a bulk request for all of the customer data, rather than doing it on an individual basis. Perhaps there is a way to avoid calling out to stripe entirely.