This is called a group buy, but it is not really one. It isn't since we aren't shipping the miners to different places. The only thing is that more people are paying for one order.

Also I DO understand what the difficulty means, why do you think else I started mining altcoins? Yes indeed, because the difficulty increased today and mining bitcoins are now less profitable than mining altcoins.
So don't try to say ever again that I don't know what difficulty means.

Have a nice day.