How many times can you get cargo pirated per run?
Answer: Just for as much cargo as you carry with you.
How many times can you get credit pirated per run?
Answer: Technically infinitely.
Cargo piracy hurts, obviously, more when you get pirated only once per run. If you run into multiple pirates that act independent from each other, you can lose more credits. Imagine the transport and the two gunboats had intercepted you independent from each other at three different locations and demanded credits.
