A month ago, I hated Inscription. Hated it with a passion and intensity that led to a 2,000+ word rant against the profession that would have been eventually been posted here, had Blizzard not opened a timely release valve in the way of low-impact Inscription. What made me so angry? Glyphs. Top to bottom, the entire design of Glyphs and what it did to Inscription... but nevermind. You are going to make gold in less than 20 minutes a day, three times a week, and all without making a single glyph (other than the ones to level you up).
I am pretty late to the blogging party when it comes to commenting on the Mysterious Fortune Card (hereafter MFC*), but that is fine, because there is nothing to really talk about. It sells. It sells in defiance to all common sense. There is plenty of text devoted to barking MFCs, undercutting, "bait & switch," and so on. You won't even need to worry about that. People bark for you, the undercutters will get bought out, and you will sell most of your stock without even trying. Price it between 35g-50g apiece and watch them fly off the shelves.
Depending on the going rates of MFCs and its market saturation, you may actually lose money doing anything else with your Blackfallow Ink. Unless, of course, you desire to profit off Inscription without even having the profession.
The above happens - look for it. Blackfallow Ink should not be trading below 10% of Inferno Ink's going rate, at a minimum. I have been selling Inferno Ink at 190g for the instant sales it generates, and with that low-ball price buying the above 60 ink for 657g would bring back 483g profit, minus the AH cut, in about nine mouse clicks. The beauty of turning Blackfallow Ink into Inferno Ink sales is that you don't even need Inscription to do it. Just park an alt in Dalaran and you are seconds away from the AH, Jessica Sellers, and the AH again. Turning those 60 ink into MFCs at 35g each would bring in 1,000g more profit however, if you did have a scribe.
...so yeah. Inscription is going to be pretty boring to talk about for the next 1.5 years.
Despite MFCs sucking all the oxygen out of the gold blog sphere vis-a-vis Inscription, I did want to offer some advice on making Darkmoon cards. The biggie? Darkmoon Card: Hurricane =! Darkmoon Card: Greatness. The latter was the Darkmoon lottery of Wrath precisely because the trinket was best in slot for most melee classes up until, and even including, Icecrown Citadel. Greatness survived four entire tiers of gear and was still amazing two years after its introduction. Hurricane, on the other hand, is likely to be outclassed as soon as 4.1 hits some months from now. It is already somewhat of a sidegrade to Crushing Weight that drops off the 4th boss in Bastion of Twilight, and people can purchase License to Slay from the JP vendor once T12 rolls around. The point is if you are thinking about jumping in, do so sooner rather than later.
I did sell a Strength Hurricane trinket for 26,000g which set the individual cards at 3250g, or the Inferno Inks at ~300g apiece once you discount the Volatile Life. If it at all looks like you can get a higher return selling the individual cards, I would do that - getting 5000g in the mail from a Three of Winds is always better than getting 400g for a Two of Stones by using Inferno Ink that would have sold five times that price. Inferno Ink that that makes each card worth at least 3500g in MFC sales at 35g apiece.
God, I hate MFCs.
*Not to be confused with that other MFC (Dane Cook, NSFW).