The EU had competition law before that mentions 10% of global turnover as a maximum fee, along with very detailed notes of how to set them: https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:C:...
The Sherman Act also mentions a ceiling of 10 million, 3 years of prison for private persons. And from history we know antitrust authorities broke up companies like AT&T or Standard Oil, which seems to me a much bigger punishment.
Both laws only mention the maximum fine.
Yet you don't see small companies sweating over competition law.