I created Frifrofru (
https://www.frifrofru.com/). Another china stores dedicated coupons/promo-codes website build using free stuff (Azure free, Mongo Atlas, Docker Hub, Github Actions). The domain is also free (2 years free).
It's alive but with no more development. Why? Most of the stores that I want to share, only provide files that I can't get automatically, no API's and from my side no time to do it manually. The project started because some friends start asking if I know some promo codes. Most of them stop buying things 1 years ago.
Bonus note: it's something that I'm against (consumerism). I prefer some of the other side projects that are focused on "green" things or in helping animals and persons.