Almost all its profits arise from its monopoly position in online and mobile advertising.

A firm may use illegal or non-economic methods, such as extortion, to achieve and retain a coercive monopoly position.

The agencies pleaded no contest and were forced to release their monopoly position.

Because the sceptics stay out, successful entrepreneurs may well achieve a monopoly position until opinions change and imitators appear.

However, according to laissez-faire theorists, when it tries to raise prices to take advantage of its monopoly position it creates profitable opportunities for others to compete.