Wikipower is a belgian private and independent initiative whose mission is to make the energy less expensive to the citizens by associating them with collaborative projects. Among these, we find the group purchases of electricity, gas and fuel oil there.
The principle is simple: Wikipower tries to gather several thousand consumers, avid to realize savings on their energy bill, to go to negotiate in the reduction their supply contract of electricity, gas and fuel oil with the Belgian suppliers … By registering you on the movement, you can realize up to 500 euros of economy a year for the electricity and the gas!
The participation in group purchases is always free and without commitment.”http://www.wikipower.be/achats-groupes-wikipower/
“Group buying, also known as collective buying, offers products and services at significantly reduced prices on the condition that a minimum number of buyers would make the purchase. Origins of group buying can be traced to China where 團購 (tuángòu) or team buying was executed to get discount prices from retailer when a large group of people were willing to buy the same item. In recent time, group buying websites have emerged as a major player in online shopping business. Typically, these websites feature a “deal of the day“, with the deal kicking in once a set number of people agree to buy the product or service. Buyers then print off a voucher to claim their discount at the retailer. Many of the group-buying sites work by negotiating deals with local merchants and promising to deliver crowds in exchange for discounts.”http://en.wikipedia.org/wiki/Group_buying