Why is skin by Kim so expensive?

Excuse me, could you please explain to me why the products under the brand Skin by Kim are so expensive? I've noticed that they command a premium price in comparison to other skincare products in the market. Are there any unique ingredients or proprietary technology used in their formulations that justify the higher cost? Or is it perhaps due to the celebrity endorsement and the associated brand value? I'm genuinely curious to understand the rationale behind the pricing strategy of this particular brand.