Roku's results were also energized, as active accounts grew 37% and streaming hours jumped 49%. Many thought revenue would be hard hit by slumping ad rates, though that didn't come to pass. Advertising generates the majority of Roku's revenue, and the company is still optimistic for the future. Overall revenue grew 55% year over year, while platform revenue -- which is made up of advertising, The Roku Channel, and Roku smart TV operating system licensing -- grew 73%.