how it works
In order to offer a paid version of your code, you create a private repository under your Github account, and keep your code there, together with the license you want to provide. Using xs:code’s Github app, you allow us read-only access to that private repository, which we clone to our servers, and keep behind a payment wall. Users who want to get access to that code, have to purchase a subscription, and can access it as long as their subscription is active.
Just look at your private repository as the code your are offering on xs:code.