People aren't using "open" in this thread as a euphemism for "nice" or "open to help." There are a lot of nice, friendly, helpful people who work on very proprietary, very closed, intentionally non-interoperable software. It's alright for you to like them personally and to think their products are great, but maybe it's not alright for them to have critical software in Linux distributions, or for people to base their own businesses on that software without being mindful that when you do that they become a defacto partner.