Ironically, Eastern games are criticized for not having a Cash Shop, specifically EXP boosts and other pay for convenience stuff. This is largely due to the culture perspective that you should be working most hours of the day and too much leisure time is seen as being lazy and unproductive. Case in point, the lead dev for Ultimate was downright ashamed they couldn't finish and even asked to work longer hours. It's actually uncommon for a director to refuse such a request as Yoshida in.

It's why Japan gets way with horrendous overwork practices and no additional pay.