Thanks for the response, i understand this intention and its good, but for me it feels a little something for free
How about including both way (usabeles and scraps)
I may thinking about sorting the scrape and having a certain probaility to have a usabel item and a sizeable amount of scrap. You could place an option with probabilties (0-100% scrap/usabele)
I just image to scouring some scarpeyrads like WALL-E (hey if you work your scape yard with the mining droids that would be a sight)
And for the useables, i would include also other (all) intermediates in probailities (lets say Green/red/blue cards - 5% / 3% / 1%)
I am not a programmer on this, but why not place your ores with your own placemechanic ?