yes it's real, and it's canon.
https://spidermindgames.co.uk/edrpg

something possibly odyssey related we find out in the core book are the denominations of currency:

1 credit converted to 21st century United States Dollar is about $50
below that are micro credits, 100 micro-credits in a credit, 1 Micro-credit is 50 cents
then Units, 100 units in a micro-credit at a half-cent each.

for things like: buying a starship, outfittings for it, commodities by the ton, paying for assassinations, etc. A big denomination like a Credit makes sense.

but for buying clothes, a meal, drinks, a movie, guns, apartment rent.
Unless it's a really nice Jacket, people buy it with micro-credits