i'm a free will sceptic and a compatiblist. And so my free will scepticism, i define as a the thesis, who we are and what we do is sor of ultimately the result of factors beyond our control. John lamos has a book right now that actually makes exactly that kind of pragmatic argument for why we should assume some form of libertarian free will - even if it's a mystery. There's no way of really making sense of libertarian free will but we must have it, because otherwise morality would crumble.