It doesn't matter. How are they going to sue someone they can't serve? Where would they serve the papers? To the Advertising firm in Dallas or the roof of the office building in Mexico? And now that they have no assets what good would a successful suit do?
Everything I say should be taken as an honest opinion and not necesarily taken as fact unless supported by links to a reliable source. I could be anyone, take what I say with a grain of salt. Anything I say of interest is purely coincidental.