Most of my wager on Plinko and RocketDice so for wager competition I play on Plinko while for the biggest win competition I play on RocketDice
We can play both at the same time just open a new tab and minimize your screen/window then let the auto spin run
check your computer every 5-10 minutes to make sure all games are active because sometimes the game error.
Yes it is possible to play multiple game in same time by opening new tap on your Pc of mobile phone. But if you go to play two games at the same time, you will not be able to make up your mind and you will always take the wrong decision that will lead you to losses. So in my opinion playing two games together is a wrong decision it can never be profitable
Even the post that you quote tells that he can play multiple games at the same time and you are just repeating what he said. And also do you already try to do that on Blackjack.fun or you just suggesting without any basis because the game showing an error if you are playing multiple games with both quick results or fast games. The server is unable to connect and showing blackscreen when you do that like the error he is describing.