From the launch blog post, "The network stack is built around lwIP, and uses libcyw43 from Damien George (of MicroPython fame) to communicate with the wireless chip. By default, libcyw43 is licensed for non-commercial use, but Pico W users, and anyone else who builds their product around RP2040 and CYW43439, benefit from a free commercial-use license."
You really don't. That's a small reel, most resellers are making it available in cut tape (single unit, or 10 chip) quantities. 500 and 3,400 unit reels will be available later in the year (in the autumn). They aren't generally available now.