Did they get paid?

Edit: Very likely they were paid, and that's where IP addresses end and sanctions begin.

Every worker within an organization has to be paid, somehow.

Somebody must bear the costs of the supposedly “free (gratis).” In the end, nothing is truly free cost. And, not a single person would work for free (no payment, compensation, or benefits, or in other words, gratis) full-time.

It is an absurdity to think otherwise.

Free and open-source software is handed out at zero-cost to make it possible to lower the barrier of entrance; to make it as widely available as possible. Knowledge should, indeed, be free (gratis).

https://medium.com/@uriadonayherrera/economics-in-foss-is-paying-for-free-and-open-source-software-an-investment-or-an-expense-19f187db8d5a