The essential feature of knowledge graphs that makes them coproductive with surveillance capitalism is how they allow for a much more fluid means of data integration. Most contemporary corporations are data corporations, and their operation increasingly requires integrating far-flung and heterogeneous datasets, often stitched together from decades of acquisitions. While they are of course not universal, and there is again a large amount of variation in their deployment and use, knowledge graphs power many of the largest information conglomerates. The graph structure of KGs as well as the semantic constraints that can be imposed by controlled ontologies and schemas make them particularly well-suited to the sprawling data conglomerate that typifies contemporary surveillance capitalism.
I give a case study in RELX, parent of Elsevier and LexisNexis, among others, which is relatively explicit about how it operates as a gigantic graph of data with various overlay platforms.