I do not have enough information. Maybe it was a publicity stunt. Maybe radiohead quitely pulled away the claim when they saw the PR.
Personaly I think its most likely a confusions. With perhaps radioheads team stating the copywrite in order to protect it but not acting it. Then lanas like ‘you can have 40%’ and Thoms like ‘I dont want 40 percent’ so Lana thinks ‘oh shit this is about to get real!’
So moral of the story should be dont talk about this crap in the media. Or maybe actaully do so. Its all publicity. Creep has probably got more streams/sales this Lana song probably has. Then maybe some one like me, who isnt familiar with Lana’s work, has a listen and likes it. Encrouging them to take a closer look at her stuff.