Efficiency is a functionally meaningless term under capitalism. Efficiency of what? Efficiency of email and phone spam? Widespread advertisement campaigns? Efficiency in sabotaging your competitors or collaborating to fix prices? Efficiency in redesigning products to manipulate your consumers and planned obsolescence? Efficiency in environmental destruction? Efficiency in finding loopholes in the legal system and regulations? In lobbying the government to receive special treatment? There are many ways to compete in a competitive market.
Society needs direction. Production when necessary, at the level that it is needed, keeping in mind ecological constraints. Capitalism is incapable of that.
Is this a feasible alternative? https://getlibation.com/
As for tunefab for amazon music, why not just use soulseek instead?