Being a pirate probably really sucked.
Your odds of profiting from a raid were dodgy. Some of the victims fought back. The authorities might show up. Don't even start with me about the storms.
If you were a pirate captain....whooo. Do you know how hard it is to get good help? How expensive to refit and provision a ship? And where do you store your money so that you don't lose it and can afford to pay crew if the raid didn't go well this time?
Especially when you are constantly on the run?
Wouldn't it be great to have a place to go? Wouldn't have to be fancy. Just some basic support to help you refit the ship, provision it and hire crew for your next raid on the coastal settlements.
This is what NIGMS has been doing with their strategy of getting sustenance grant funding to as many of their people as possible. Keep lots of privateer crews, sorry, labs, alive...but just barely. Then you know they will launch raids on the other ICs to bring in their booty. Which they will spend a lot of back at the pirate stronghold.