Why can't companies just leave their services alone when they hit upon something good?
Amazon UK are changing the Prime service to include all the streaming TV/movies they previously supplied through LoveFilm. Which would be fine if it were the same price, but of course, it isn't. And can you have one or the other of the services (free next day delivery being the other)? No, of course you can't.
I predict the loss of rather a lot of existing LoveFilm and Prime customers when renewal dates come around (mine is August, and I will not be renewing).