Miners seeking new capital have always had a variety of options. Tthey could issue new shares, take out a loan, enter into joint-venture agreements, or divest non-core assets.
However, in the last decade, a new option has emerged called “precious metals streaming” – in which streaming companies essentially offer capital up front to mining companies in exchange for metal later. If properly executed, the end result is a win for both parties that can ultimately provide value to investors.
Source: http://www.visualcapitalist.com/how-precious-metals-streaming-works/