Is the RTL8188CUS chipset free or not?

Hello, everyone.

Please tell me, is the RTL8188CUS chip free or not?
I can't understand the logic of the website https://h-node.org

For example, the EW-7811Un Wi-Fi adapter https://h-node.org/wifi/view/en/604/Edimax-Technology-Co--Ltd-EW-7811Un-802-11n-Wireless-Adapter--Realtek-RTL8188CUS-/ if you look at the description,
it says:

“Its Realtek RTL8188CUS chipset requires non-free firmware.”

But at the same time, it says:

“Does it work with free software?”
“Yes”

I also don't understand the logic of whoever created this site—why are chips or other devices listed here that don't support free software?

This confuses the user; they come here to find a device that works with free software and then buy it, but they see the message

does it work with free software?
NO

Why are all these devices on this site?