If you take it as an entertainment, then have some advantages. But if you take it as a earning source then lots of disadvantages you have to face. Patience is the key to success in gambling. Gambling teaches you how to keep patience. When and how do you take right decision gambling teache you. Worst disadvantage is you lost your emotions and wealth. Day by day you fall in deep depression.
For entertainment then provably they can always gain advantage knowing how fun to play on various site but you still need to be in control to not lose any huge amount since this will never be fun if that situation will happen you also winning a huge amount will just be a bonus after that. But as discuss for people who seek profit maybe they cannot get that here since imagine how huge the risk for playing plus if we became greedy then most provably we lose our money here since the chances to lose is bigger than to win.