I would argue that it is not possible to slowly built that ecosystem. Samsung apps are crap and popular apps that people want create no motivation from develope

I would argue that it is not possible to slowly built that ecosystem. Samsung apps are crap and popular apps that people want create no motivation from developers to support yet another platform. That's why the Windows Phone failed -- even though Microsoft offered shops with reasonably popular apps both money and placement to make them available in their store at the end the cost of supporting another platform was too high.