Clearly if you do not published, you can never be cited…However, interesting to see that the Natural sciences field seems to taper-off more quickly than the life science field.
An interesting reads at TechCrunch on new forms of dissemination and measurements of scientific impact: Reputation Metrics Startups Aim To Disrupt The Scientific Journal Industry.
In a similar vein, you might want to read the excellent editorial by John R. Alder from Stanford entitled “A New Age of Peer Reviewed Scientific Journals” published in the open access journal Surgical Neurology International. The manuscript is available on Cureus blog.
Most of the crackpot papers which are submitted to The Physical Review are rejected, not because it is impossible to understand them, but because it is possible. Those which are impossible to understand are usually published. When the great innovation appears, it will almost certainly be in a muddled, incomplete and confusing form. To the discoverer himself it will be only half-understood; to everybody else it will be a mystery. For any speculation which does not at first glance look crazy, there is no hope.