This license scheme is used to describe web applications that require no registration for normal use. It may also include some cases where a cost-free obligation-free registration is required for full functionality. This does not preclude the option that some such web applications pursue commercial interests, e.g. by placing advertisements on their pages. Web applications that require payed subscriptions to be used in normally should be classified as Webapp, commercial subscription, even if these sites should provide some forms of limited cost-free access for trying out the service.