If you bought a wired router, you will need an ethernet cable or usb cable, depending on the router setup, to go between your modem and your router and from the router to the computers that you are trying to run off that router. So for two computers you would need 3 cables,….one from the modem to the router input connection and one from each of the computers to the router outputs.

Had you just mentioned the sites by name rather than with a URL you might have had a stronger case against the advertising claim. Even then, though, ….

Hope that helps.