Looking at https://meta.stackexchange.com/questions/110916/how-can-i-best-use-stackexchange-as-a-qa-site-for-my-own-project which has been closed as a duplicate (quite right), we see three 'linked' questions in the sidebar; however, only two of those questions are given as duplicate-close-targets. Use Stack Overflow as the official support site of an open-source project which to my mind is the actual 'exact duplicate', isn't mentioned anywhere else except in the 'linked questions' sidebar itself!
The blogpost that introduced linked questions says:
The Linked sidebar... gathers up any links to this question provided by the community via comments, answers, or questions
So how did Use Stack Overflow as the official support site of an open-source project get into the linked questions sidebar of https://meta.stackexchange.com/questions/110916/how-can-i-best-use-stackexchange-as-a-qa-site-for-my-own-project? (There's no explicit link in the other direction, in case you were wondering.)
