In the case of Federal Trade Commission v. American Tobacco Company, 1923, the Supreme Court ruled in favor of the American Tobacco Company. The Federal Trade Commission (FTC) had accused the company of unfair competition practices by acquiring competitors and creating a monopoly in violation of Section 5 of the FTC Act. However, it was determined that these acquisitions occurred prior to when this law came into effect and thus could not be considered violations under it. Furthermore, while some actions were taken after enactment, they were part of an ongoing process initiated before its passage which also exempted them from being deemed illegal under this act. Therefore, due to these circumstances surrounding timing and continuity with pre-existing plans for business consolidation or expansion strategies predating legislation meant to regulate such activities more strictly for fair trade purposes; no legal grounds existed upon which charges against said corporation could stand according to majority opinion held by court justices presiding over proceedings at hand during time period specified above.

In the dissenting opinion for Federal Trade Commission v. American Tobacco Company, it was argued that the majority's decision to uphold FTC's order against American Tobacco Company was an overreach of power and a misinterpretation of the law. The dissenters believed that while Congress had given FTC authority to prevent unfair methods of competition, this did not include practices which were merely unwise or inefficient but still legal under existing antitrust laws. They also disagreed with the majority’s interpretation that price discrimination constituted an unfair method of competition in all cases, arguing instead that such determinations should be made on a case-by-case basis considering market conditions and competitive effects. Furthermore, they expressed concern about potential negative impacts on businesses due to uncertainty around what constitutes "unfair" practices under this broad interpretation by FTC.