Thanks for your reply @AvadaCommerce  I'm not entirely sure I understand your point about scamming though. We are a respected app with 1000s of existing customers, some of whom use Shopify. We dont have the internal resources to comply with the billi...

Is it really required for Shopify app developers to integrate into the Shopify Billing API - even for unlisted apps? This seems really odd to me. Wondering how others have found this request?