I've always worked at companies where we use third party open source libraries utilities and its true that they get less-than-ideal amount of auditing when they get updated but at least we're not constantly pushing updates of to our customers solely for the sake of using the latest version. In fact usually they're out of date by several years which is also a problem but generally there'll be a guy following the mailing lists for updates in case there's a known exploit that needs to be patched.