Let's Encrypt is a part of the Internet Security Research Group and is literally a Public-Benefit Organization in California.
Still a subjective measure in some way I suppose, but they are not for profit and I think it would be hard to argue that the organization is not a benefit to the public.
There are plenty of organizations that are incorporated as Public-Benefit Organizations that might still be considered objectionable to get a free pass on hiring posts.
Still a subjective measure in some way I suppose, but they are not for profit and I think it would be hard to argue that the organization is not a benefit to the public.