The difference between owning your project and being hostage to a single vendor.
When you don’t own your app’s code or its store accounts, every change — a small tweak, a new feature, or even moving to another team — goes through the vendor, on their terms and at their prices. And if the vendor shuts down or shifts priorities, your project stops with them.
Full ownership means you receive the source code, and the App Store and Google Play accounts are registered in your company’s name. You continue with the same team because you want to, not because you have to — and that is what “We Build, You Control” means.