The reason FD'ing is so arcane in that thread is because being direct about it brings a lot of attention (which results in a lot of people booking itineraries) and the airlines shut it down.

What you're trying to do is make it obvious, straightforward, and accessible. People will pile on, and then the tricks will stop working. The people with the knowledge in the FD thread have a vested interest in not having that happen. The less people that know about the tricks, the longer they will continue to work.