If a user posts an answer that just says "use commercial product X", is it spam?

See for example [this answer][1].  It looked spammy to me, so I flagged it, but the flag was declined.  I'm sure there's room for judgment here, like in whether the user is promoting the product, but I wonder if the moderators could tell us some of their criteria so we can flag more usefully.


  [1]: http://serverfault.com/questions/459707/administering-server-2012-with-rsat-on-windows-7/667053#667053