Oh, wait a minute - we don’t even pay anyone for Roku. We bought the setup at Costco, but there’s no subscription for Roku itself.
(I think we did subscribe to a weather channel...)
Aside from the device, there is no monthly fee or subscription to use the device or the various free streaming apps like Pluto, Tubi, or even the Roku stream itself. Our device did require registration and payment info as you can add and access “pay” apps like Netflix, etc. Of course YMMV.