If you just normally quit the program there are still plenty of services from nVidia left running ;)
So for someone wanting to stop geforce experience he would also have to disable all a bunch of services which are coming with the tool.
Well, there this comes to my mind: http://www.pcgamer.com/nvidia-faces-false-advertising-lawsuit-over-gtx-970-specs/
Don´t get me wrong - I´m a long term nVidia user and this is probably going to stay that way - but at the end of the day nVidia just is another company looking for profit.