what Sony should do next:
Create subsidiary third party company to make modchips.
re-release the modchip to only work with a firmware of your design. Charge 150$ for the device.
Update the firware to interrupt the USB for a split second every 15 seconds (or something like that) to cancel out the existing USB hack.
Update firmware to require Sony brand ps3 hard drives by some method, say, an extra wire in the cable and HDD. I'm not sure about the logistics of how it would work.
Now your pirates must at least pay you 200$ of net profit, they can't just buy a ps3 and use the USB netting only 10-20$. Deny online to anyone who uses the modchip.
Release a 200$ modchip that allows for hacked games to play online. Update firmware a year later to ban them from PSN.
Upon release of ps4 release a new modchip that does everything for 300$
