As of July 16 2019, we will no longer be supporting product versions in our API responses.
The concept of a product version has been replaced by product price points. This mainly
affects the subscription response, which currently includes a
This subscription hash is included when fetching subscriptions, and also in a lot of webhook
The subscription hash now includes a
product_price_point_id, which can be used in lieu
of the product version number going forward. For more information on the product price points
feature, see the documentation here.