The benefit of using a solution like Open as App is that you can publish apps and share them with the world within seconds without having to create a developer account, sign APK oder IPA files, go through the publishing process...
It is not possible to publish the tools you create in the store as a stand alone app. There's a lot of functionality running in the background of your app in the Open as App container App. The solution you've created - which is awesome - is just one part of the whole infrastructure.
By using the Open as App container the responsibility to meet the iOS Store or Google Play Store guidelines is on us. This will save you a lot of time, money and sometimes headaches.
If you want to monetize the tool you have created, we have some good news for you. We have already some users selling subscriptions through their website. After the checkout and payment on your website, you would "unlock" the app for this customer by inviting him to the app.