So, here's another effort by the Muni Adbusters, tweeted by a friend of a commenter (which is kind of better than a friend of a friend). This one would suggest that the culprit in this guerrilla art campaign/sly critique of capitalism is not the most careful of spellers some have also pointed out the lack of familiarity with the real Tartine, which does not sell doughnuts. This time, it's jeweler and accused blood-diamond seller De Beers that they're targeting, except they spell it "Du Beers."
And yes, diamonds do equal blowjobs, so... not sure what the joke is there.
Previously: Another Fake Ad Spotted on Muni: Fartine, Who Put Up This Dirty Ad on Muni?!