I have been playing since 2005. I have never really relied on the auction house to make my gold (I don't have the time, what with me having a life and all). In fact, I hardly ever use it. But as the years went by, I've always managed to get my gold total to progressively increase with each expansion. Not so with BFA. In fact, my total has actually gone down since BFA launch. Is this normal? Yes, I have been buying items from the rep guys, but I do that with every expansion. My gold started stagnating a bit before BFA, but since launch ... wow! I guess I can kiss that dinosaur mount goodbye!
For scribes who can't and won't go all in with crafting Darkmoon Cards, an attractive alternative is to also dip into the other "odds and ends" inscription items. Particularly popular and profitable are BoE shoulder enchants (both blue and purple rarity), Runescrolls of Fortitude and the pair of companion kites. And if players had to choose only one of these, BoE should enchants are "easily one of the best money makers, in terms of gold per hour" because of their consistent demand and persistently solid wow gold price
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Special note: The two Darkshore changes will only take effect after the current Warfront cycle has ended. So if Alliance is attacking Darkshore in a given region when Season 2 begins, and has 3 days left in that attack cycle, that Darkshore will still give Season 1 rewards. ◦This is being done to avoid any unfairness to people who had already completed the Warfront or done the world boss just prior to the season rollover.
Level 120 comes and goes. Island Expeditions have unlocked, but it turns out they’re not much fun, and the most rewarding versions are only accessible to premade groups. You turn to Warfronts only to realize they’re not available this week. Fine. You can always grind out better gear. Except as you do, you notice your new gear has higher Azerite requirements than your old gear, which means your shiny new items have fewer unlocked traits than what they replaced. Discouraged, you decide to roll as one of the cool new Allied Races. Except you can’t because they’re all locked behind reputation grinds.
In Legion, some of the dungeons include the Black Rook Hold, a max-level dungeon in Val’Sharah that once served as an elven fortress but has been corrupted by a malevolent force. If you decide to quest in Stormheim, you can also try to clear the Halls of Valor, which lets you take on the Vrykul God-King and vanquish the pure Val’kyr that are superior to those found in Northrend.
On my server, I can usually craft cards for around $2000/card and decks average for about 25k/deck (average selling price of all 4 decks) . The average profit per deck is around 9k gold, and I can process (on average) 9ish decks per hour. This means that the average gold generation rate of processing linen and herbs is about 80k gold per hour. That also leaves you with a massive pile of red pigments that you can AFK craft to scrolls for extra profit. (Crimson pigments gets generated at 75 pigment/min for "free" when milling for Viridescent, there is an extra 500ish gold per minute of profit when AFK-crafted to scrolls, that's not insignificant)

I think that's server dependant. I make a lot of Golems, but the price on my server is high enough that you could buy all the living steel and still make about 20K (almost 200kg on AH). Its just that you proc all the way up the chain. You proc 20% of your trillium, and then 20% of your living steel. SoH and Ghost Iron are such low effort farms, too. 20% of 180 Trillium Bars at 500g is 18k more profit, 20% of 150 Living Steel at 3500g is another 105kg. That's an extra 25k profit per Golem. If they stop selling stockpile them for the next expansion, they always boom with the price of herbs. And a consistent 20% proc rate is the opposite of RNG, its extra free stuff as a benefit to completing an extra quest (not to mention for new alchemists the investment of leveling Vanilla Alchemy). You're looking for some get rich quick scheme, where the real way to build wealth is patience and volume. No market is going to be viable because you want it to be. Only because you make it viable.