No they are not contributing. I was working at a big german car maker for the last 5 years and fighting with them so they would allow the devs to upstream all t

No they are not contributing. I was working at a big german car maker for the last 5 years and fighting with them so they would allow the devs to upstream all the patches they made just so we would not need to maintain those patches, so it would be cheaper for them. But after 5 years there was still no process for any dev to do that.