Whatever happened to a full published book?

I have a point I need to make to authors out there. Whatever happened to you writing a full book. I am talking about giving your readers a whole book at once. Not giving their readers a first part, second part and so on. Stopping a book at a weird place as if it is a mini series on television. Are they doing this to build suspense, to get more money via making an E book verses a paperback book? You would think that the authors would know that waiting months between "publishing" their E book "chapters" that their readers would forget about these characters. I am not talking about an on going series that actually finishes a story and then a few months or even years another full story book or E book comes out. I am talking about half of a "book". More and More writers are doing this, it is starting to frustrate me. If you want more money, then please just write the whole E book and publish it all at once for $ 6.99 trust me, I would rather pay that then $ 99 cents for a "chapter".