No need for a forum index for non-forum thread views.
Find doesn't like our multi-result query, so search and get first
Users watching all replies who are not subbed to a special post not notified.

Users who don't generally subscribe to replies have the opportunity to
subscribe to a 'special' thread.

Basically poking a little hole in the notifications cycles - a daily
notification cycle entry is created if the user elects to check out the
special notification.