Ben Affleck and Matt Damon’s ad business is proving that it was never just an A-list vanity project

Pop quiz: Which two Super Bowl ads were created by Artists Equity Advertising, the commercial creative arm of Ben Affleck and Matt Damon’s studio Artists Equity? Hint: It was the two starring . . . Ben Affleck and Matt Damon.  The big game ads for both Stella Artois and Dunkin’ were excellent vehicles for both actors. But they’re also the rare occurrence of major advertising investment—which goes well beyond the $8 million just for Super Bowl airtime—going to a boutique...