### Comment:
The issue I see is how much longer will they go unchallenged.  Google has been the only viable search engine for 20 years.  For a technology company that’s an eternity.

### REPLY:
It's not just that they have a monopoly as a search engine. Their ads are tons of sites not owned by Google because of AdSense. Even if Google search engine stopped being used today there would still be a market for their ads.

### END.