Two rulers, one answer: medicube leads Amazon skincare

A best-seller list and a sales estimate are not the same thing. Amazon's list is the retailer's own ranking; Spate's figure is a model — estimated monthly buyers times median price, over a trailing 30 days. When two different rulers agree, the reading is worth more than either one alone.

What our reads show

Fact. In every fresh read of Amazon's US skincare best-seller list since early August — six of them — medicube held the #1 or #2 spot, with five to eight medicube listings in the top 100. Observation. No other brand was in the top two in every read. The #1 spot itself rotated — body lotion and cotton-pad basics from eos and Amazon Basics took it in four of the six reads — but medicube was always at or next to it. We report this at the brand level: these lists don't let us follow individual products week to week.

What Spate estimates

Spate's September report on Amazon skincare puts medicube's Zero Pore Pad at #1 among US Amazon skincare products by estimated August sales, at about $3.9M a month, and medicube at #1 on its Popularity Index of search and social interest. It also names medicube and Biodance — both Korean — as the clearest cases of online buzz converting into Amazon sales. Inference. Two methods, run by different teams over different weeks, land on the same brand. That is the kind of agreement we wait for before calling something a lead. Biodance, the other Korean brand Spate names, also shows up on our side: it was #1 on Amazon's skincare list in our mid-August read.

Where the buzz doesn't convert

The same report flags the opposite case: brands with big online conversation but modest Amazon sales — Rhode, Dior, SkinCeuticals and Curology among them — and attributes most of the gap to distribution rather than demand. For K-beauty, the pattern this summer runs the other way: the brands people talk about are also the ones on the shelf.

How to read this

Our reads are not evenly spaced: for three weeks spanning late August to mid-September our Amazon capture repeated an earlier list, so those weeks are left out rather than counted twice. Spate's figures are estimates for August; ours are chart positions from August to late September. We don't place the two on one scale.