I use it every so often when I notice something peculiar. None of my feedbacks actually became so popular. Even then I know one of them has been fixed. The fix probably didn't come because I have pointed it out, but I was happy about it regardless.
I couldn't find a web-link to the Hub, so I think it is not entirely public, but surely available to the Windows 10 users.
[1] https://support.microsoft.com/en-us/help/4021566/windows-10-...