Comment Re:"Reasonable" my ass (Score 1) 700
The fake chips most certainly do represent themselves as FTDI chips, by using their FTDI's USB vendor ID.
It is quite possible for them to use the same hardware interface with a different vendor ID, but then they couldn't use FTDI's driver for free.
In fact, the whole reason FTDI makes the ID a writeable setting is so that other companies can use (genuine) FTDI chips in their products, but use their own vendor ID. Usually they'll use FTDI's driver too, but when it is plugged in, Windows will identify the device as "Company XYZ's Device" instead of something generic like "USB to Serial Converter".