Shopify Collabs’ subscription integration now uses the Shopify Subscriptions API, allowing it to seamlessly work with any third-party app using the API. When you have both a subscription app and Shopify Collabs installed, you'll find new subscription settings under Programs > Tiers. These settings enable you to offer discounts and/or commissions on the first order in a subscription series or a specified number of orders.
→ Read the full update on changelog.shopify.com