Ok lets assume you dont throw away your burning embers / infernos like Critical does for his Casual Goblin Experiment and you do place a value on infernos. So why value 1 inferno to be equivalent to 10 blackfallows?
Imagine you could find a buyer to take your infernos and give you 10 bf inks. Sweet deal? Well Critical found someone! Himself! Lols! /Critical cackles madly.
How does Critical do this? He used to have a second business called TRINKETS R US which only made cata darkmoon trinkets which sell for profit. So Critical would trade infernos for blackfallows at the rate of 1:10.
This all started because Critical started off with DM cards only (no glyphs/trinkets). He milled and converted all blackfallows into infernos hence i=10b. Over time this has not changed because DM trinkets have always and still are able to be sold at or above cost. With that assumption Critical can get his cost price super low and apply the mega glyph hug of death (ooooh like the sound of that, no one stealz it please).
I dont quite know what else I can do to convince readers DM trinkets sales are the bomb. However if you are going to mass post (and therefore mass craft) you will end up with mass infernos that will need to be dealt with.
The above explanation may not be what you want to hear, but it explains Critical's way of handling infernos and hopefully helps by showing another way to view infernos.
Hmmm I wonder if gemmers and chanters are as crazy as glyphers. So many mad readers.