Much of the Pentapod interaction with humanity seems to be commercial. We get details of lots of products made by Pentapods for human markets, many successful products, some not so much. Pentapods are selling this stuff to humans and getting paid in human money: Livres, dollars, Euros, whatever.
What do the Pentapods do with all of their profits?
Human money won't be much good in the Pentapod home systems, so they wouldn't be shipping it home. They must be buying something with it in human space, where the money is a store of value and measure for exchange.
Are they buying human products to ship home? If so, what and why?
Are they buying raw materials to ship home?
Are they buying stock in human corporations, or maybe real estate on human worlds?
What do the Pentapods do with all of their profits?
Human money won't be much good in the Pentapod home systems, so they wouldn't be shipping it home. They must be buying something with it in human space, where the money is a store of value and measure for exchange.
Are they buying human products to ship home? If so, what and why?
Are they buying raw materials to ship home?
Are they buying stock in human corporations, or maybe real estate on human worlds?