Does/would anyone even drop 100 though? I know if I was stopped by a bonafide pirate willing to negotiate and not be a pew pew, I'd be so damn happy to meet a reasonable human being that I'd gladly negotiate a pirate tax.
But 100 tons, unless you are driving a type 9, is roughly half the cargo max of most ships - big ballpark I know but for easy math say it's a decent talking point for the usual cargo spec type 7, asp, clipper, python etc.
On my type 7, my just over 200 ton cargo of imp slaves usually has a value of 3.5M. I make at most a profit of 675k. Call it a real rough avg of I make about 1/5th in profit of my total cargo.
So if you ask me to fork over 100 tons thinking that is only half my cargo, that is actually my profit plus 2x the additional loss, or a total of 3x. And if I don't have the seed money to replace that cargo in order to make that profit loss up, personally I'd rather just fight the pirate and hope I cause some paint damage before I blow up.
Even on a type 9, I would think 100 tons would be the entirety of almost their whole profit margin for that trip.
Is there any trader that is or would be willing to drop 100 tons?
For my type 7, 40 tons basically represents my entire profit margin - so I'd drop 50-50, or 20 tons max.
As a poor pirate, I've always used a cobra. Now I have a vulture and max cargo is 36. So I've never asked a trader to drop more than 36 and they usually have no problem with that.