I think it only makes sense if you have the time to actually watch your portfolio constantly & be a "day trader".
stick to a price you want and do not chase
Besides, this is a fantasy game & why would you pay for a monthly fee on a service that really doesn't improve your chances of winning! Everyone is here to learn and have fun doing it.
You are right! You have to be at your computer all day watching this stuff for real time to be worth it. I've learned to check in the AM, leave it alone and check back around 3 to see if I need to sell anything. It goes up and down so much it drives me crazy. I do better when I dont watch it.