“The advantage of open source is that it enables organisations to work together to develop a system without limits, contracts or procedures.”
That’s the same flexibility that works for schools in the North, big and small businesses and individuals. It all stems from FLOSS licences like the GPL which permit running, examining, modifying and distributing the software. It works for sophisticated users and developers too. With FLOSS those can be the same organizations.
Interestingly, the selling point of the software once the developers came up with a demonstration, was not the cost but the flexibility, the fact that it did exactly what the organization wanted, not what some external corporation wanted. That’s the right way to do IT for most of us.