They use Matrix page: case studies

## Goals of the page

- Convince everyday people that Matrix is used in real life applications, and getting familiar with it is going to help them in their life/career
- Convince community managers that significant communities are using Matrix and that it's a sturdy base to build a community on. Using it fosters more collaboration both thanks to federation and bridges, and can help them grow their community
- Convince developers that there are significant communities relying on Matrix, that the ecosystem is striving and that their work could get a lot of visibility
- Convince entrepreneurs that there are large organisations relying on Matrix, and there is a market for Matrix related services

## Content of the page

- For community managers: case study of KDE, GNOME, Fedora using Matrix and being able to talk to one another easily
- For entrepreneurs: case study of DINUM, and other public sector users
- For entrepreneurs: case study of non-instant messaging products built on top of Matrix?

Start from the goals and audience list in this issue; no file, test, or entry point is named. Done means a Matrix.org case-studies page covers KDE, GNOME, Fedora, DINUM and other public-sector users, and non-instant-messaging products while addressing the listed audiences.

Written by the indexing model from the issue text.