Impact is important as "monopoly" is subjective. For example, in Googles financial filings they can't break down numbers because *the search industry is highly competitive and we face challenges from the many other players in the industry".

So a company might have close to 75% market share in an industry that matters and they would be a lot easier to prosecute vs the company w/ 100% market (a fleshlight, or other trivial niche thing)