When you say “no organic reach” do you mean for a massive number of followers? That may be true unless you’re a known brand already.
On Twitter, I’ve seen my follower count rise, drop, rise … drop again and now I don’t even bother with it. I use hashtags to connect as much as possible.
On Facebook, I can’t even imagine there’s organic growth — or maybe we need to change the definition since growth comes through one’s network.