I'm more curious about the 'stop using' button than the registration button.

If it's the bank encouraging registration, I'd like the option to manage or cancel it directly within the banking app. Having to go out of my way to reach out to a different company's customer service makes it feel burdensome from the start...

I think I could make an informed choice if it were easy to understand what information remains, who handles it, and what exactly happens when I withdraw, all without complicated explanations.