Subscribtion items with 0 quantity

There has been a new option added to SIMPLer settings that allows 0 quantity being used for subscriptions. It can be enabled from Settings -> Modify WISP page under 'Billing - Zero quantity subscription' option.  It can be used in cases where an operator would like to show that a particular product/service is available to a customer, but they have not purchased it for the moment. The option is turned off by default.

Fig. 1: WISP Settings

Fig. 2: Billing - Zero Quantity Subscriptions