Now that I'm writing a weekly newsletter, I'm increasingly interested in how weekly news is valued.

The big picture: As media companies decline in profitability, they're increasingly being traded more as trophies than as businesses. Many billionaires expect a financial return on their media investments. But others, including Benioff, Jeff Bezos, Pierre Omidyar and Laurene Powell Jobs, do not.

By the numbers:

• Businessweek was sold for $5 million in 2009 to billionaire Mike Bloomberg.
• Newsweek was sold for $1 in 2010 to billionaire* Sidney Harman.
• Pearson's 50% stake in The Economist Group was sold for $731 million in 2015 to the billionaire Agnelli family.
• Time was sold for $190 million last week to billionaire Marc Benioff.

The bottom line: For them, owning a media property is a quasi-philanthropic way to invest in civil society. In terms of personal satisfaction and broader social acclaim, it's cheaper and more rewarding than buying a new yacht, or jet, or private island.

*He was worth way more than $200 million, so he was a billionaire, don't @ me.