I've been using promokod.com for about a year, checking it out before making big purchases — mainly on Ozon, Wildberries, and Lamoda. Overall, I'm satisfied with the site, although there are some nuances.
What I liked:
— a large database of stores; I almost always find what I need;
— promo codes are mostly valid, especially for major retailers;
— it's convenient that next to the code, you can see when it was last checked;
— there are collections by categories and seasonal promotions — it helps not to miss sales;
— the interface is simple, nothing superfluous, and pages load quickly.
What could be improved:
— I would like to see more user reviews on the promo codes themselves (worked/didn't work), not just the percentage of votes;
— the mobile version works, but some buttons are a bit small, so you have to aim.
In conclusion — it's a decent discount aggregator that fulfills its purpose. Over the year, I've really saved several thousand rubles on various purchases, so checking here before placing an order has become a habit. It's not a perfect service, but definitely one of the most convenient in its niche in the Russian internet.