As an example of viral marketing in practice, vouchers may be provided via email to customers, who are then encouraged to forward those emails on to friends and family. In 2006, Threshers (a UK-based off-licence retail chain) emailed vouchers to staff and suppliers. The emails were then redistributed by recipients, ultimately resulting in many of their branches almost running out of stock when the vouchers were honored by the company. While at the time the Thresher Group denied that they were attempting to run a viral email-based marketing campaign, the company repeated the exercise the following year. Similarly, a campaign for a Ferrari test drive garnered over 40,000 responses even though only 5,000 emails had been sent.