I might  be interested in giving it a try, but I'm not sure I understand how the ranking works:
"The winners are the top 20 users that accumulated the most free credits during the month of August playing only the 2 games Live Roulette and Live Baccarat"
=> Is this the total amount of credits you earn, no matter how much you lose, or just your final balance? Do reloads affect your score (say, someone reached a final balance of 500 without ever reloading vs someone reached a final balance of 600 but reloaded twice) ?