Apologies in advance for a policy, rather than a programming question, but given the paucity of information available online I hope I can be forgiven for asking it here.
I am sorry that i am coming into this a little late, but i have an answer for this.
Basically about a month ago i submitted my app and it got rejected for not including iAP as it links to our SAAS website for users to set up their subscriptions. So off i went and implemented Auto-Renwing subscriptions. didn't take me too long and from testing worked fine. So i resubmitted. and got rejected again.
We found that the Purchasability Type for one or more of your In-App Purchase products was inappropriately set, which is not in compliance with the App Store Review Guidelines.
Cloud-books is set to Auto-Renew Subscription.
Based on product functionality, it would be more appropriate to use the non-renewing subscription In-App Purchase type. The Auto-Renewable Subscription product is best suited for apps that require or feature dynamically or frequently changing content, such as digital periodicals or radio subscriptions.
Even though when creating an iAP product there is a nice little line that says this:
Non-renewing subscriptions can still be offered, but auto-renewable subscriptions are now preferred for the following reasons:
So from my experience auto renewing is NOT allowed for SAAS.