The Impact
Stack
Not For Sale’s three-tier operating model — deployed in every country, built to move from crisis response to self-sustaining enterprise.
Why does slavery persist despite billions spent fighting it?
Because most interventions stop at rescue. They pull people from the river but never go upstream to find out why they are falling in. The Impact Stack is designed to go upstream — and to build something permanent when it gets there.
Most organisations operate exclusively in Tier 1. Some add Tier 2. Almost none build Tier 3. The Impact Stack moves through all three — in sequence, in every country, adapted to local conditions.
“The most powerful form of prevention is a community with ownership of its own future.”
The principle behind the Impact StackScalable Ventures
Not For Sale invests in enterprises that create jobs, generate revenue, and build long-term community sustainability. This is the flywheel: ventures return revenue to fund more Tier 1 work.
Research &
Business Development
The question is not “how do we help these people?” It is “why are they vulnerable, and what economic opportunity exists to change that?” After ~2 years of Tier 1 work, NFS tests market-based solutions.
Social Intervention
Direct service with survivors and people at extreme risk — housing, education, medical care, legal support, nutrition, safety. This is where most organisations begin and end. NFS begins here, but does not stop.
The flywheel.
Enterprise funds service. Service produces research. Research informs enterprise. Each tier feeds the next — indefinitely. This is why the Impact Stack does not require permanent philanthropic subsidy to stay alive.
since 2007, all tiers
Stack is deployed
NFS by REBBL alone
planet-tier programs
Where it’s deployed.
The model in practice.
Same framework. Different paths. Both work.
to date via REBBL
to NFS Netherlands programs
The Montara Circle.
The specific mechanism Not For Sale uses to move from field research to enterprise creation — where REBBL, Dignita, and the Entrepreneurship Challenge were born. Two days. One challenge. A company as the output.
Read the full story →Fund every tier.
The flywheel only works when every tier is resourced. Your contribution determines which part you power.
Direct service — housing, education, and medical care for survivors and people at extreme risk.
Donate to Tier 1Community fieldwork and business development — the research that finds the next enterprise.
Donate to Tier 2Seeds a venture — creates jobs, returns revenue, and closes the flywheel for a community.
Seed an Enterprise →