holdover
.475 A&M Magnum
Their business their rules doesn't all of a sudden stop because "they are big and I don't agree with them."
see:anti trust laws
Free and open markets are the foundation of a vibrant economy. Aggressive competition among sellers in an open marketplace gives consumers — both individuals and businesses — the benefits of lower prices, higher quality products and services, more choices, and greater innovation. The FTC's competition mission is to enforce the rules of the competitive marketplace — the antitrust laws. These laws promote vigorous competition and protect consumers from anticompetitive mergers and business practices. The FTC's Bureau of Competition, working in tandem with the Bureau of Economics, enforces the antitrust laws for the benefit of consumers.
Guide to Antitrust Laws