Most powerful secrets are never posted. The handful of people that are able to discover them (after significant effort) keep them a secret, specially if its connected to profit (selling this crafted item).
I always think back on original edition of The Secret World and it's amazing complexity of deck building. How each skill in deck affected another one and players who place significant effort (and had decent IQ) managed to create overpoweded decks simply by using their brain and placing an effort in good deal of parsing and experimentation.
Now there were people that wrote tutorials on web and posted some very nice OP decks... however, the best decks were never posted, trust me.
I know because I played in perhaps the worlds top guild, with few players, and the decks we made and used were never given out... those "OP decks" posted on web (that become meta, and were widely accepted as cookie cutter builds) were not even close to the decks we created and used.
Those very best decks were kept as the top secret never to be shared with the rest of the world.
To this day I'm still probably the only player in the world that soloed a nightmare dungeon boss, pre Tokyo (when 10.5.5 was max gear). I never gave out the deck that I used, and process of how I used it to anyone.