Why is the DOJ investigating Andreessen Horowitz’s board seats?

Andreessen Horowitz has two partners sitting on the boards of companies that now compete with each other: Ben Horowitz at Databricks and Martin Casado at Fivetran. Nothing too scandalous on the surface, except the Department of Justice has reportedly been investigating the arrangement for almost a year, dusting off a 112-year-old antitrust law that’s rarely used against VCs.  Board conflicts aren’t exactly new, and these companies weren’t necessarily direct competitors when a16z first invested…