I disagree. I don't even want to start the thing if I don't
know that there is an ending. If I buy a couple of chapters and then it peters out, I'm cheated out of my ending.
Also, I'd want the writer to produce a complete book. I imagine that sometimes developments in later chapters will force some revision to the earlier ones, as plot lines are fleshed out. Releasing a chapter at a time won't allow that.