The citation graph is one of humankind's most important intellectual achievements

In 2016, Thomson Reuters sold its Intellectual Property & Science business to a private-equity fund for $3.55 billion. … it’s ironic that the vision of building a comprehensive index of scientific literature has turned into a billion-dollar business.

Except it hasn’t turned into a billion-dollar business. That $3.55 billion paid for a large portfolio that included Cortellis, Derwent Innovation, EndNote, GeneGo, IDdb, IDRAC, MicroPatent, Techstreet Industry Standards, as well as Web of Science.

My company subscribes to about half of these products. Web Of Science is the cheapest by far.