That is a good question that I do not know. But since they're the ones hosting it on their servers, they may have the most legitimate claim to the ad revenue since it does cost money to keep the trailers on their servers and to stream it to viewers.
I am not a lawyer, though. This is just pure speculation on my part.
I have a 34" IPS ultrawide from 2018 that I've been using heavily for work and personal use (essentially 14+ hours a day). Since it's an IPS panel I have no worry about burn-in. And I can keep using it for another 6-7 years without worrying about it.
With an OLED panel in the same scenario, I'd expect to see some burn in happening within 3 years of getting it.