This is a sinstone in Revendreth describing a genius designer that made deathtraps for their own amusement.
“Their genius earned them a place in Craftenium, but their smile earned them a place in Revendreth first.”
Basically this is where the Tinker Class concept went when it died lol
A meeting room full of people spent 12 hours coming up with a name for the crafter afterlife.
I think Craftenium explains an important plot point in Shadowlands.
If all the geniuses are sent to Craftenium, that explains why every NPC in Shadowlands seems to be kinda dumb lol
The patting on the back commences as Joe Nobody is proud of the name he came up with after 48 hours, no sleep, meeting on what to call the place. 
What if it was named ironically? And there are no crafters there, just clumsy uncrafter types who can’t even craft a sandwich.