I imagine it's a huge success metrics-wise. The infinite scroll and bright pictures, even the sizing of the preview boxes as 2/3s screen height, it's perfectly

I imagine it's a huge success metrics-wise. The infinite scroll and bright pictures, even the sizing of the preview boxes as 2/3s screen height, it's perfectly tuned to maximize user engagement time. And since they put extra effort into maintaining the old design, they seem to have lost few users if any. Few companies have pulled off a successful transition like this.