Earlier quoted context omitted.
They ran all of their competition out of business.
Google Maps was a revolutionary product that popularized the category, they had no competition when it was released, at least now there's Apple Maps, Open Street Map, Bing Maps, Tencent Maps. I was developing with ESRI ArcGIS at the time, ESRI was a multi-billion dollar GEO company who had no product that even came close to the instant utility Google Maps launched with. The only other product that had a similar "Wow"…
There were multiple competing products when Google Maps was released, so they had competition. Google's product was simply better at than most alternatives at the time.