User asks "Is IIS SFTP natively supported by Windows Server 2012 R2?". The question is in "protected" state.
The correct answer is that IIS does not support SFTP and that he has to install a third party SFTP server. Having list of third party Windows servers could be helpful, but might be considered spam or 'shopping recommendation' type of answer.
I'm maintaining list of SFTP servers for Windows at sftp.net/servers.
Is it OK to post a new answer to that question with a link to the site? Or is it considered a spam? The site is free.
Is it recommended to post an excerpt from the server list in order to have at least a part of answer in ServerFault just in case if sftp.net goes offline? Are links to specific servers recommended or forbidden?