THIS YEAR, AUDI RAN the first-ever Super Bowl commercial to feature a Twitter hashtag. Did you miss that watershed moment? Don’t feel too bad: The hashtag—#ProgressIs, a take on the carmaker’s line “Luxury has progressed”—flashed on the screen for just a second, near the end of a surreal and entertaining ad that featured millionaires trying to escape from a minimum-security prison, and a cameo by, who else, sax man and Lite-FM staple Kenny G.
In addition to pushing the hashtag on TV, Audi purchased a....