Earlier quoted context omitted.
Just to clarify, I was never a developer of Passbolt. I think they based their repository off of CakePHP (which I do maintain) and inherited all the commit history that way.
Thank for the clarification. Sorry for the misunderstanding this caused.
https://github.com/passbolt/passbolt_api/graphs/contributors
What I'm working on are developer insights and I've found the most intuitive way to look at contributions is to sort them by latest commits.
With this type of display, you can quickly see who is contributing on an active basis, and for how long. A good example would be the vscode repository.
Here you can see a lot of developers have been contributing on a steady basis for quite some time.