I went to 川妹子外卖 few times, some of dishes I really like, some not. but I never blame 川妹子, everyone has his or her own taste, you can not expect everything you like, if you like everything cooked by yourself, why you eat out.
For the cost, why you care to much, it's not a lot of money, only few dollars, 川妹子 doing business, they have to making money, if not, it's call donation. I don't think they are rich enough to donate every day.