I’m afraid so too.
Personally, I would not run away from a hybrid C4D + ZBrush package that offers an affordable indie license for small freelancers. If ZBrush would seamlessly interact with C4D for rendering, rigging and animation, that could be quite interesting. But I doubt that’s going to happen. So if Maxon announces subscription-only for ZBrush as we know it I will fully go for Blender + Quad Remesher, but saying goodbye to ZBrush will bring some heartache.