All big companies WILL buy support as that's what they do.
All big companies WILL buy support as that's what they do.
Previous reply;
You haven't worked with big companies before then; they pay for support (and licenses if needed). It's how it works as it is a liability thing; if you pay for something it's better than free as free doesn't exist. And that's kind of true; for free open source you need highly skilled employees to maintain it while you can also buy support from the company who actually built it. TL;DR big companies buy your support if they use your open source.
Small teams of motivated people can make just about anything work. For everyone else, support makes project schedules more predictable and can avert certain painful scenarios.