The problem with gambling or any kind of minigames , giving any kind of profit, in a MMO might be the balance issues as well.
It's of course too early to tell how it would work and what kind of system there is gonna be, but assuming some similar SPECIAL system, where Luck determines who is going to win the gambling, it might cause some troubles.
(Assuming an account will be able to have more than 1 character per server) For example a slot machine idea.. You might create a gambler character and make huge money with it and transfer it to your "real" character.
Because MMO's are not "pure games" where people play just to have fun, it's some kind of second life, where people want to be successful, no matter how.
But of course, a system where all of these minigames are totally interactive, meaning you can only play them with other real players, would solve this problem.
Just wanted to share my thoughts about it
Oh, and also hello there gamesas family!