Retailers are applying the same 1970s technology to the online shopping experience as a means of combating bots. Some retailers are moving high-demand sales back to an in-store purchase model where they can make sure each person is carrying only one of the desired items to the register. While this level of friction may defeat an automated bot, it does not preclude hiring individuals to be your shopper s The solution to combat bots is to have a virtual waiting room where users wait for two, three or four hours online (like waiting in line in line)
Source: https://threatpost.com/sneakers-gaming-nvidia-retailers-shopping-bots/165838/