Once upon a time, there was a neuter singular Greek noun, kudos meaning glory, or fame in war.
About ten years ago, I started noticing it used as an American marketing term, meaning, of a gadget, useful. Fly Fisherman magazine, for example, used it in their annual awards. At this point, it changed into a plural noun, as if the unit quantity of respect were one kudo.
This afternoon, I noticed the ultimate degeneration: the president of some Linux company writing to the Register, spelling it kudo’s.
I only hope the Kudo comes and gets him in the night, like the wendigo (plural, wheredewent).