I'm 2 yrs into the game also (started at the end of Oct 2016), can confirm that RNG for older players are awful (At least they are for ppl who got in the same time as me). I always thought it has something to do with keeping older players in the game by not giving us what we want, thus we are forced to stay longer to get the ninjas that we want so badly.

Honestly, at this point I'm just gonna piece together the ninjas that I want. Spare my fists from punching walls after spending so much cpns for nothing.

Heck, over time coupons-only ninja can be almost completely free. I'm 4 frags aways from having Kushina Hanabaro and still haven't pay a dime for her.