They tend to serve different goals
Organic content tends to build trust and a durable audience relationship over time. Paid social is a faster, more reliable lever for an immediate goal: driving traffic to a launch, filling a gap in reach. Treating them as competing choices misses that they serve different purposes.
Paid social often performs better on top of a real organic foundation
An ad promoting content that already has organic engagement tends to perform better than the same ad with no organic proof behind it. An engaged following provides a credibility signal that paid spend on a cold account does not have.
A reasonable way to decide the split
For most small businesses, a foundation of consistent organic content, supplemented by targeted paid spend around time-bound goals like a launch or a seasonal push, tends to be more sustainable than relying entirely on either one. The right proportion depends on how urgent the goal is and how much organic reach already exists to build on.