The "store" is in some sense a package manager and installation queue application; it still can provide value even without discovery... if nothing else, for paid products, it provides a convenient way for users to purchase the product with stored credentials and then an account mechanism to do license transfer to new devices (which is the reason why most developers used my payment system and most users wanted them to, even though I didn't force anyone to do so: I solved these problems well, which added value, particularly for the smaller development efforts that don't have the resources to pull that work in house to decrease their fee).
