Hulu's future ownership may be in question, but the video streaming site is apparently doing fairly brisk business on the paid subscription front. During an advertiser event this morning, the site announced that it has managed to double its Hulu Plus accounts in the past year, up to four million. The site's revenue also hit a record for the first quarter of the year, though Hulu's not giving out any numbers. As with rivals Netflix and Amazon, the company's making a big bet on original programming, with a number of exclusive series, including the animated
