It is all about luck you may hit at first roll or never.What is my experience on primedice or other dice sites there results under 0.90 appears many time when I am rolling at 2X.I don't know how it will work if we roll the dice for a multiplier of 900X or above.You need to be lucky to hit because last year if I remembered well some one hit this multiplier.
"NEVER" will only exist when players do not have more money to continue hunting the big multiplier or if the site cheat players.