1929
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.
The individual cashier won’t care, but the manufacturer might, especially if they’re returned as defective because they then make their way back as RMA.
Shops will also stop stocking the item if it stands out because more people return them.
They want to make a profit after all and if they have to discount items as “open box” then they’re losing out on profit, especially since the margins on some of these are already pretty low for retailers.