Roku is a publicly traded company so they’re obligated to provide this information publicly, in the 10-Q they send to the SEC.
Page 6 of the below PDF has their revenue broken down by category. Going by Q2 of 2026:
Advertising: 673m
Subscriptions: 548m
Devices (hardware): 134m
Spot on. Thats really interesting. Especially the subscription revenue. Never knew they had that. Thanks for providing a link to that! I got some research to do.