Once you get over 128mb in flash drives the prices become prohibitive. Unless being both portable and small are essential I cannot see anyone shelling out the bucks for one of these when you can get a 2.5" 2TB usb external drive for around $80.
Also as first they had similar looking 512GB flash drive. After premiere it cost ~$800. I got it for tests but had to return it. I guess that in the box there is also USB cable so you can use it with any USB port ( it's hard to use it on most motherboards when you have other USB devices ).