How often may my server query https://buy.itunes.apple.com/verifyReceipt in order to verify the status of an auto-renewable subscription? Is there any pricing or quota for this?
To ask this another way, does this "verify receipt" endpoint have a connection limit (either per minute, per hour, or per day) that my server must respect to access it?
(I am not able to find any mention of query limits and pricing in https://developer.apple.com/library/mac/releasenotes/General/ValidateAppStoreReceipt/Chapters/ValidateRemotely.html)
