RED seems to have been fraught with controversy pretty much since they first launched way back in 2005. The big issue at the moment – and for most of the last few years – has been their patents covering raw video.
It’s a long drawn out topic that’s currently being fought out between RED and Nikon after Nikon’s inclusion of N-RAW in the Nikon Z9. Nikon’s disputing it, seemingly arguing that RED shouldn’t have been granted in the first place.
Source: RED slammed for “DESTROYING the camera industry” with patent trolling – DIY Photography