The purpose of the non-profit organization is to always place the community first when the for-profit might fail to do such.
The non-profit pushes the mission of MUI through MIT-licensed code. This is in opposition to the for-profit Company that relies on both MIT and commercial licenses to achieve the same outcome.
A few key pieces of information:
Initially introduced in 2017 to help share the donations and revenues between the different team members and accept Facebook donations.
It was only in 2019 that the for-profit company was incorporated to execute our vision at a higher velocity. At that point in time, based on the open data you can find above, Material UI was generating about $200k/year.