Fox mostly sat out the streaming wars, but it could soon surpass Netflix in US TV viewership anyway. Buying Roku would make Fox the third-largest TV distributor in the US by monthly viewership, according to Nielsen's March data (or fourth-largest if Paramount Skydance secures control of Warner Bros. Discovery). How did that happen? It mostly comes down to viewership growth in the free streaming business, which both Fox and Roku have focused on. Fox would have a 10% US TV viewership share across