[Postosuchus]

You might have missed the memo, but Roku's main business has been advertising for quite a while. It is just shrouded in streaming and platforms. But it is advertising nevertheless.

Being a platform, Roku benefits from advertising 3 ways - by running its own ads in some apps and on home screen; by exercising carriage rights on 3p apps that show ads (getting a cut as a platform); and by building and selling audiences for targeting.

For all I know, Fox has zero interest in platforms or technology. But they are fairly sophisticated when it comes to adtech and this is purely an adtech play.