Success isn't illegal. Flatly illegal for monopolies are contracts that function to restrain free trade, as well as marketing practices that take unfair advantage of a product's market dominance. Also called predatory bundling or tie-in , this practice involves requiring customers to buy a second product along with the one they really want. This tactic can be used to push competitors out of an existing market, or to establish a foothold in a new market. Predatory penetration pricing .
Competitors go out of business, even if they have superior products.
Enforced path dependencies . In this strategy, the firm builds trivial or unnecessary modifications into its market-dominating product. These modifications have no purpose other than to force consumers to accept the company's offerings in new markets. Well, you get the picture by now. This is business hardball, and everybody does it.