So what Roku's revenue soared 79% year over year to $574.2 million, fueled by a 101% surge in platform revenue, to $466.5 million. The gains were driven by a 35% jump in active accounts, to 53.6 million, and a 32% rise in average revenue per user (ARPU), to $32.14. Roku's advertising platform is becoming more attractive to marketers as people shift their viewing habits away from traditional TV and toward streaming services. Ad dollars follow eyeballs, and companies are increasingly willing to pay up to advertise on Roku's system. "OneView, our ad platform built for TV streaming, connects brands, performance advertisers, and our content partners with their target audience," CEO Anthony Wood and CFO Steve Louden said in a letter to shareholders.