Facebook has started blocking all advertisements for digital coins such as "bitcoin" and "Ako".
According to the American Redcode site, this step is designed to prevent users from advertising financial products and services that are made with misleading or deceptive promotional practices.
This decision means that any advertiser, even those with legitimate business, will be prevented from announcing any offers of virtual currency.
"Rob to Arouse", one of the advertising technology managers in the Facebook social networking site, sees the policy as helping to detect and stop misleading advertising practices.
The move triggered the shock of businessmen and investors who believe that "Facebook" unfairly punishes companies and legitimate businesses that deal through these currencies.