i fully agree.

the system obviously did not pull through this month and whoever was caught up in that will be sure to burn their account.
if you do tell them it is 2600 MAX DD and mathematically impossible to pass that cap, then someone is being dishonest without refunding.

you simply cannot tell them it is 2600 MAX DD and if they setup their account that way, do you think they are going to make 1000 pips? your system can go on and on forever making X amount of pips and X amount of DD. But so can martingale systems. What gives?

even so, are you refunding those 3 people who have traded with their real money?