The complaint published when Ulbricht was arrested included information the FBI gained from a system image of the Silk Road server collected on 23 July 2013. It noted that, "From February 6, 2011 to July 23, 2013 there were approximately 1,229,465 transactions completed on the site. The total revenue generated from these sales was 9,519,664 Bitcoins, and the total commissions collected by Silk Road from the sales amounted to 614,305 Bitcoins. These figures are equivalent to roughly $ billion in revenue and $ million in commissions, at current Bitcoin exchange rates...", according to the September 2013 complaint, and involved 146,946 buyers and 3,877 vendors.  According to information users provided upon registering, 30 percent were from the United States, 27 percent chose to be "undeclared", and beyond that, in descending order of prevalence: the United Kingdom, Australia, Germany, Canada, Sweden, France, Russia, Italy, and the Netherlands. During the 60-day period from 24 May to 23 July, there were 1,217,218 messages sent over Silk Road's private messaging system. 
Second, count the balls. Assume recycling. Imagine 3 pics. Before stacking (), after stacking (on), and after removal for recycling (). Imagine say 30 balls visible on the hill and in the gully in . After stacking balls on the road this number falls to say 20. Ten balls will be on the road, or more due to addition of balls from off-frame. After recycling, the ten plus road balls will be gone and possibly some additional balls from the gully, so say 15 to 20 balls visible. Compare off to on pics. If the number of balls off the road in the off pic is greater than the number of balls off the road in the on pic, then off is and it is the first picture. If the opposite if true then off is and it is the second pic. If the number is the same then we can’t say anything for sure, but haphazard recycling seems less likely.