How do buyer and seller cooperatives operate?

"Cooperatives are autonomous businesses owned and democratically controlled by their members—the people who buy their goods or use their services—not by investors. Unlike investor-owned businesses, cooperatives are organized solely to meet the needs of the member-owners, not to accumulate capital for investors. As democratically controlled businesses, many cooperatives practice the principle of “one member, one vote,” providing members with equal control over the cooperative. There are two types of cooperatives. Buyer cooperatives combine members’ purchasing power. Pooling buying power and buying in volume increases purchasing power and efficiency, resulting in lower prices. At the end of the year, members get shares of the profits based on how much they bought. Obtaining discounts to lower costs gives the corner Ace Hardware store the chance to survive against retailing giants such as Home Depot Inc. and Lowe’s. Founded in 1924, Ace Hardware is one of the nation’s largest cooperatives and is wholly owned by its independent hardware retailer members in stores spanning all 50 states and 70 countries. In August 2017, Ace opened its 5,000th store. In 2017, the company reported its revenues in the second quarter were $1.5 billion, which was an increase of 4.6 percent from 2016’s second quarter. The net income for the second quarter of 2017 was $51.1 million. Seller cooperatives are popular in agriculture, wherein individual producers join to compete more effectively with large producers. Member dues support market development, national advertising, and other business activities. In addition to Sunkist and Land O’Lakes, other familiar cooperatives are Calavo (avocados), Ocean Spray (cranberries and juices), and Blue Diamond (nuts). CHS Inc., the largest cooperative in the United States, sells energy, supply, food, and grain."