This forum helps. Couple of hints though.
1) don't ever spread them until you have booked yours if you are going
2) don't ever call the airline thirty seconds after booking the fare for fifty cents asking about upgrades, asking to change your seats, whatever. Don't do anything to draw their attention to the mistake.
Unfortunately, lots of people have been totally ignoring hint number two, so fares don't get mentioned here near as often anymore, too many people spoiling it.
Fatwallet is another good source, though for the most part they are just copied from here.
Once it hits any of the more wide distribution lists like farecompare or fat wallet, it's life is probably very short, as by then the airline certainly is aware of it.
You are usually talking just a few hours they are alive, so it's not that uncommon to miss them .