Someoe hoping somehow we'll spend 36 kobans lets say on average per point - lets say you can get 10 without spending you need to spend 3,240 kobans so 13,000 nutaku gold...£130/$130 for ONE girl...and I can't see you not needing to spend at least near £/$100 if you're able to maximise time spent and a little luck and you get the daily kobans...

Effectivly dangle carrot let the whales bite - problem is - if the price is too high - too few will and you will ROYALLY nark off the rest, if it was say $20 or you could get lucky....maybe people may bite

Right now as I've said before the cost -> reward ratio on this game is so low I'd never spend...outside I dropped $1 once to get a few more kobans

TL/DR - super monetisation and a greedy and/or stupid dev