Git repos are distributed by design. I bet all the contributors have at least 1 branch (probably closer to an average of 3) of this project on at least 1 computer that they own.
Decentraleyes extension on Firefox results in garbled text. Not sure why this happens. It is supposed to serve some common assets locally instead of requesting them over the network.
I would imagine it would enable you to run MacOS specific pipelines like building a project and have it work semi-portably across different machines/users.