I wanted to ask about this also but in more detail.
If we have 1 VPS, and we have been making 6 demo accounts, I am not sure I understand how to run all demo accounts at once on the VPS. using MT5 while you have all your accounts in the navigator window, you can only be logged into 1 of them at a time in the terminal of mt5, so how are we able to have multiple instances of MT5 running? Currently i have 20 bots testing on 1 of my demo accounts. Can I test with 40 or more bots running? Is that too much for the system or for the instance of mt5 to handle?