Actually there is, but only for recent Mac under MacOs Big Sur 11.2 or greater:
https://render.otoy.com/shop/primex.php

and not only for C4D, but also for:

- Maya
- Houdini
- LightWave
- SketchUp
- Blender
- Unreal

They are limited to max 1x GPU, and it requires Big Sur 11.2 or greater, with an ...

Hello. Whether I ask the question there, however, it does not matter.

Will there ever be a prime free tier for Cinema 4D ?