We've added an ability to set minimum and maximum quantity restrictions when using per-unit pricing.

When such restriction are set, they're automatically reflected in Stigg's plan picker widget. When Stigg is integrated with a billing solution (such as Stripe), the quantity restrictions are also auto-magically applied to the checkout page.

The quantity restrictions only apply to subscriptions that are created in a self-served manner, and are not enforced on subscriptions that are manually created in the Stigg Console.