[benglish11]

Citus is owned by Microsoft as well.

https://blogs.microsoft.com/blog/2019/01/24/microsoft-acquir...

[I_am_tiberius]

Yes, the company, but the plugin is some sort of open source.

[znpy]

Open source stuff are still subject to ownership via copyright.

The license allows you to do many things, but not everything.

The copyright owner on the other had, can do everything.

That’s why many projects nowadays require you to assign copyright to the team before accepting a contribution.