Coins can get you 1-5% off on a lot of offers even with no 11.11 or Chinese New Year’s going on. Sometimes you can even see 7-10% just from coins, but always always always check price + discounts + shipping (add to cart and look at the real total) because usually they make some offers seem cheaper by moving some of the amount to the shipping price and you get screwed vs. the actually cheapest option.
You can easily get a lot of coins by opening the mobile app daily and tapping Collect, then you can open the Gogo Match game for another +20 just for logging in, and if you don’t mind playing 4 levels you can get 5 more after the first level and 20 more after the next 3 levels. But by far the best in coins per effort is to just open the app daily as that amount gets to 70/day after 6 days.
They used to have Search for Similar Items in the product popup frame you got on hovering over a search result, it used to be a quick way to find cheaper offers for the same product, but lately it shows unrelated garbage. The equivalent is now if you go to the product page on mobile, open one of the product pics by tapping it, then use “Search for Similar” there - it gives you alternate prices on the exact same product like the hover-frame used to last winter.
Watch for the campaign-wide discount codes, those have to be entered manually and they’re single-use, so you have to make sure you’re using the highest one that’s valid for the total price of the cart you’re completing. Some sellers will show you those codes in a single image with multiple colors to show country-specific codes. For those it makes sense to bundle stuff in a larger cart to use the larger value code, then make a smaller cart to use the next lower-value code and so on.
As mentioned above, each seller may have an extra coupon to offer just for being a follower, so absolutely click Follow everywhere you see a good offer you’re going to consider a serious contender to compare with others. It doesn’t fill your inbox with spam or anything, so there’s nothing to lose.
Then with each seller’s larger coupons usually they’re restricted in terms of which products they can apply to (even if the price is a match), so you have to investigate to get clear on that one. I’ve had instances where a lower-value shop-wide coupon was overriding a much better product-specific coupon, and there was nothing I could do except if I had paid attention I could’ve maybe not clicked Collect on the shop-wide one until I got clear on what each of the product-restricted ones did for me first.
There’s a lot of “coupon engineering” they require but if you go deep into it you can get some ludicrous discounts, like I have a solar power station, refurbished, that I got for less than half of the new-product price last Cyber Monday, and it has no defects. They tried to cancel, claiming they didn’t have any more stock, but I just extended the shipping term by 1 month and stood my ground, and they delivered in January after all.