Yes, CyanogenMod is dead. Cyanogen, a failing company, is pulling the plug on CyanogenMod.
The open source project for the last 3 years has been taken over by the commercial entity Cyanogen or Cyngn. This was a company setup by Steve Kondik to go big league. A serious of missteps ended up here. You can read about it blow by blow on Reddit and others.
The developers at Cyanogen and CyanogenMod has forked the open source code into a new branch called LineageOS. At first, I thought this is good for everyone, the show will go on”. Someone mentioned about chipping in a few dollars to keep the servers running (eg Jenkins the build bot, Web servers for the builds etc). I was all for it, until I had a second thought what is there to stop what has come to pass?
In the new LineageOS setup, Steve Kondik is involved and rightly he should be since there is no other visible champion. There must be some kind of governance to prevent another Order 66.