But going back to Quark serving food, i always thought it was real food because then why would people pay for it if it's replicated???? so i assumed they are paying for it because it's real food. Quark always ordered Kanar and other weird drinks/foods to sell, isn't that real food???
I don't think anybody paid for the food at Quarks. They paid for drinks, service and so on. Although Quark did refer to having crates of Yamok sauce sitting around unused.
The drinks served at Quarks were mostly real, although how he managed this given that his customers were from all over the galaxy. Can you imagine a bar offering to serve every different beer on Earth ?