Twitter seems to sell customer metadata to select governments and commercial and political entities. Thus, Saudi Arabia, China, and other nogoodniks can find out who follows dissidents and critics or political partisans or commercial products.
Twitter is being sued by a Sports Illustrated model named Genevieve Morton whose nude calendar photos were sold by Twitter to a XXX site. Turns out twitter sells your image naked or not to anyone to be used by the buyer in their ads.