Have Cultists ever been in a chaos codex, they just seem like such an important unit of the mortal followers.
Even in black library, DOW and background they are important.
I cant see them being powerful, more like a meat shield that knows no fear.
I hope they put them in the next codex.
But back to the topic
2 Questions.

1. Have they ever been in a chaos codex.

2. Would you like to see them in the next codex.