In October 2013, the administrator of the online black market Silk Road was arrested in the United States. Silk Road was a website that users were able to access using anonymizing browser Tor. At the websites, customers would be able to purchase illegal drugs from vendors and have those drugs sent to their home address.
According to the affidavit by the FBI, the site cleared $1.2 Billion in sales in a two year period. The owner of the website is alleged to have made $80 Million in commissions.
There were 957,079 user accounts created on the website. Nearly 30 percent of the accounts were based in the United States, followed by accounts created in the United Kingdom.
Source: Nick Allen, “First British Silk Road suspects arrested by new National Crime Agency,” Telegraph, October 8, 2013.