The Windows Store has just enabled support for subscriptions, as can be seen in the screenshot above. Developers can use subscriptions to sell digital products with automated recurring billing.
Developers can offer a subscription period of 1 month, 3 months, 6 months, 1 year or 2 years, and also offer a free trial period of 1 week or 1 month so customers can try out the add-on before they commit to purchasing.
Customers can manage their purchased subscriptions from the services & subscriptions page for their Microsoft account where they’ll find all the subscriptions they have acquired, with options to cancel a subscription or change the form of payment associated with a subscription.
For any add-on subscriptions in apps (but not games), developers receive 85% of the subscription price, minus applicable taxes. For game add-on subscriptions, developers receive 70% of the subscription price, minus applicable taxes.
Read all the implementation details at Microsoft here.