I suspect that&#x27;s because for the most part it just siphons off the traffic that would have mostly been a waste to serve anyway, being that they were either looking for such a small bit of information to be encapsulated in the excerpt, or they determined they were looking for something else, they would be hard to monetize.  Then again, I could be wrong or there could be usefulness to users hitting the end site that isn&#x27;t directly monetizable (brand awareness).<p>I wonder what percentage of the knowledge graph result excerpts are full entries, and don&#x27;t trail off indicating more can be found on the source site.