Is Tao Caicai a liar?

Amoy Caicai belongs to Taobao. I found some owners using it in the community WeChat group, and told me that it was cheaper to buy food in it. I have bought it several times. To tell the truth, it's cheaper than the food market. I'm not sure about my weight, because I don't have a scale at home. I bought fruit twice, once it was not bad, and once I felt a little bad. I am very lucky. I have never bought meat, but I can buy snacks, which is cheaper than supermarkets.