Sponsored narratives aren't necessarily false or even misleading, but sponsorship casts a shadow over their veracity. It corrodes the altruistic possibilities of human discourse, inserts covert sympathies, manipulates emotions and loyalties, inserts the levers of power into the very heart of our language.
Sponsoring a narrative isn't purely a financial matter though. Money certainly comes into it, because publicity comes into it, but so do the endless subtleties of social caution and that ingrained fear of new ideas we all know too well. Above that we have the advisory phone call, the discreet lunch, the country house party, the raised eyebrow, the nudge, the wink and the old school tie.