It's legal in the US to have an awesome product that monopolizes the market as long as it wins on it's own merits.

The government is claiming that the search market is being monopolized, not by having the best results, but by paying $45 billion dollars/year to various browser suppliers to make Google the default browser. That's the illegal act.

> "Essentially, Google has bought up all of the shelf space where search is placed in front of consumers, which is to say browsers and phones. This behavior is very similar to what Microsoft did in the 1990s, when it bundled its browser with its operating system, and signed deals with ISPs to block its browser rival Netscape from getting access to customers. The analogy isn’t a coincidence, as the Microsoft case is controlling precedent. "