Three questions, and the whole stack: the platform fee, the subscriptions app, and the surcharge for bringing your own payment processor.
The same figures are worked through in prose, with three example businesses, on what Shopify Plus really costs a subscription business.
Shopify does not publish Plus pricing thresholds. The figures below are reported consistently by partner agencies rather than by Shopify, so treat them as well-sourced rather than official, and check your own contract before acting on any of it.
“We made the switch from WooCommerce to a custom solution powered by Marzipan. Managing our orders is a breeze and the flexibility of the subscriptions API has allowed us to enhance our old vine adoptions offering.”
“Marzipan is incredibly easy to use, and extremely flexible and configurable. It makes recurring subscription wine clubs much easier than any other system I have used, and copes with pretty much everything we have thrown at it.”