This type of events is lke playing on a casino,all gamble. Last time masked man was in an event like this a guy from my server got him in the first free fraw first day of event, while some other guy spent 10k coupons and didnt get him, this time another guy from my server got him in the first 10 draw. I got edo deidara in a 10 pull in lucky wheel, while people spent way more and didnnt get him. Its all just rng regardless of the acctual drop rate percentage. I usually just do a 10 pull to try my luck, personally i dont like to go all in and end up wasting all my coupons.