A Standard campaign allows you to specify a User Initiated paywall.
When specified and the campaign is live, the assigned paywall is used whenever the user interacts with a control in your app that should raise a paywall.
For example, you may have a Subscribe button somewhere in your app. Use the User Initiated paywall to control which paywall is presented to the user in response to this interaction.
Learn more about how your developer can support User Initiated paywalls.