I see what you’re saying, but I think there’s a moral argument to be made for wanting code to be open source, but for humans only. Contrary to what law says, corporations are not people.

The contributors likely feel like their altruism is being exploited by mega corporations who are looking to harvest free labor. I sure wouldn’t want to work on a project if that’s how I perceived my users. But that doesn’t diminish their desire to provide a code base that anyone can use, learn from, modify, etc.