Uh, companies are part of society, and one of the biggest contributors to free and open source software development. If you want an example of a FOSS-only project, look at GNU Hurd, it’s a forever unfinished project because the alternative (Linux) was rocketed forward by corporations contributing patches and whatnot and thus became far more attractive.
So I guess I really don’t understand your problem with corporate contributions. They make the software better, so it’s a mutually beneficial arrangement.
If corporations didn’t get involved, FOSS would hardly be a usable replacement vs proprietary software for most people because few people actually have the time or drive to consistently develop it. Corporations do, because they need the software to satisfy their business cases, and thus are willing to invest time and money into it.
So I guess my question to you use, how does a corporation making money from something it shares with the public negatively impact you?