Armed with new cash—which came after the most recent sale attempt was called off in 2013—Hulu has become newly aggressive in the content marketplace, with deals for original shows and big franchises like its acquisition of streaming rights to “Seinfeld” for $700,000 an episode, as the Journal reported in April. In the process, it has become an important piece on the complex chess board between Netflix and media companies, who are increasingly nervous about the impact that Netflix, with its 40 million domestic subscribers, is having on their business as ratings fall.