Nothing was said to make money, be rich or avoid someone else (being big companies) becoming rich.
At the origin, the greatness of the concept was that you were free on your own computer to do whatever you wanted, how you wanted it. For yourself. And more particularly, FOSS was allowing anyone to have access to tools and server software that was restricted to companies with very expensive and complicated licenses before that.
See Linux that gave access to an Unix-like OS at a time were it was unreachable to hobbyist. In my own time, I remember this incredible pleasure of being able to host his own web server with WAMP or LAMP stack, at a time where you were forced to buy and use windows Pro with corporate license IIS to host even a simple website...
Nowadays, the greatness of FOSS is that anyone can still access for free, without string attached, to all the software needed to train and run LLM models.