I do nothing, my ranking improves?

I have enjoyed watching my 8a ranking increase recently as I have done nothing but work too much, climb too little, and get progressively weaker and weaker.  I haven't sent anything since September, yet my ranking has increased by 4 places.  I think I may just sit on the couch and eat ice cream to reach the U.S. top ten.  Has posting on 8a gone out of vogue, or are people out there equally as lame as I am and not sending s#@@@t?