There are two main types of customer for rough diamonds – Sightholders and Accredited Buyers. Sightholders have a term contract. Accredited Buyers (a customer type introduced in 2014–15) have a more ad hoc arrangement. De Beers also sells about 10% of its rough diamonds through online auction sales. The company pioneered the approach in 2008 when it broke with 44 years of direct sales to hold the diamond industry's first online international auction sale. It is now the world's leader in this kind of auction sale.