▶️ Video
India
Free
Intermediate
Companies That Grow Without Ads (Delta-4 Theory)
On YouTube by Kunal Shah (Founder, CRED) ~15 min
Why we picked it
The eChai edge: Kunal Shah's Delta 4 framework is the sharpest lens for judging an idea in a price-sensitive market like India, where you must be dramatically better, not marginally better. It explains why some products spread with zero ad spend and others die despite marketing.
- If your product is at least four points better on a ten-point efficiency scale, adoption becomes irreversible.
- Delta 4 products grow through word of mouth and often become verbs, no ad budget needed.
- Marginal improvements don't change behaviour in India; aim for an obvious, undeniable leap.