@strypey OK, I'm signing under this. 馃憤 As you say, folks ought to know (and they should read the full thread if they want to make an informed decision, anyway).
@vintprox just in case you missed it the first time around, here's the link I included when I pointed out that there are licensing issues:
https://isitreallyfoss.com/projects/mattermost/
I'd hate you leave you hanging, thinking I'd claimed a project has proprietary components without supplying details : D