I have one of each (alchy, inscriptor) and neither is a huge money maker. There are minor exceptions -- I created a few Nobles cards with inscription (420 inscription or so skill?) and each sold for 2k gold, cost me around 100g in mats. However its random which card you can create, and the other decks aren't worth as much -- one card only sold for 50g, so a 50g loss. You need a HUUGE amount of Northrend herbs for inscription and making the 80 Darkmoon cards, since each stack of herbs will generate 1-3 icy pigments, and you need 12 icy pigments per card (plus 3 eternal lifes).

Alchy is prob even worse, the titanium xmute is on a 4 day cooldown (!) changing to 1 day in next patch. Titanium isn't worth much and the mats are heavy. Really not much else to xmute, since the eternal xmutes share a cooldown with titanium (plus you need to "discover" all of them via titanium). Alchemy is a money sink for the most part, its nice to make certain flasks for your team but its not a money maker.

The best money maker at the moment is obviously mining/herbing, followed by Jewelcrafting imo - 15 mins doing a daily nets you 300g+ every day.