Also worth context here that Stagwell is set up like another major holding company. They own Targeted Victory (R) and SKDKnickerbocker (D) as their two pillars in DC/public affairs/campaign comms. They also own other non-political communications companies.
I’m always struck by US Grant in this regard. Suffering of debilitating cancer of throat, but convinced by Mark Twain and others his memoirs would bring financial benefit to his family after a failed business post presidency. He completed them and died a few days later, his final mission for his family.