Not-for-profit institutions are exempt.

Having worked in government, I don't see why they should be excluded from paying.

But I think a charity could fall under the 3rd one here.

"Examples of freely permitted usage include:

Personal projects with less than $10 million revenue per year Students and teachers (whether in an educational or professional setting) Research at not-for-profit institutions Personal contributions to non-commercial open source projects"

Second that. The crazy t&c required by gov have to be accounted for.