OSS does not necessarily mean the contributions are from "goodwill or part-time contributions". In fact, I would wager the most widely used OSS software is largely written by contributors paid to do so by corporations. At least for Linux, about 80% - 85% of contributions are from developers paid to do it (https://newsletter.pragmaticengineer.com/p/how-linux-is-buil...)
Corporations have had many reasons to invest their money in open source software -- custom requirements, marketing / developer mindshare, commoditizing complements -- but as cutting edge LLMs get more and more expensive to train, you'd be hard-pressed to find corporations who will put in that kind of money if they cannot recoup their investments.
Corporations have had many reasons to invest their money in open source software -- custom requirements, marketing / developer mindshare, commoditizing complements -- but as cutting edge LLMs get more and more expensive to train, you'd be hard-pressed to find corporations who will put in that kind of money if they cannot recoup their investments.