This is a substantial blog post about a problem that seems like it could be easily remedied by the vendor adding an "originally reported by" or "referred from" field to their issue tracking system, and giving issues w/ that field populated w/ a third party the same priority as issues that are submitted by third parties.

Otherwise, 'Radar or GTFO' is just outsourcing a required step of the vendor's QA process to third parties that aren't on the vendor's payroll or chain of command, ie. unreliable, as documented in this blog post.