1791
As if it wasn't bad enough that they want me to use a random internet service to add a keyboard to a usb wifi receiver, they have the balls to put this for Firefox users. I clicked out of pure curiosity, as I'm not even remotely interested in involving a corporate internet service in getting my keyboard connected to my computer. This is the message you get now on Logi Options software if you have a Unifying Receiver: 
For the curious: https://logiwebconnect.com
EDIT: some people on the thread have brought up that the error message being displayed for Firefox users is due to the WebUSB API not being implemented by Firefox due to security concerns. This still does not justify having to use a web app to plug peripherals to a PC.
I get this fun error:
Since I have no clue which random USB cable came with the keyboard I am locked out of the settings or updates for my 200€ keyboard.
God, I hate everything. Type C was meant to make everything easier, not fuck us over with non-standardized proprietary versions from every fucking manufacturer.
They can program a c cable to only work with their products?
No, but with how many conductors there are in it and how many standards it theoretically can support, they can be pretty creative with what and how they connect beyond standard USB.