Trashy, cheap, and an embarrassing [and blatant] attempt to seduce the K-POP fans into buying Chanel cosmetics and perfumes. Let's be honest, 99% of Blackpink followers are not going to be buying RTW, and Chanel knows that perfectly well.
Besides this seems so inauthentic. At least with the other ambassadors they have a kind of more established relationship and ongoing dialogue with the brand and with the history of Chanel. When you hear them speak and when they are interviewed, they have something of actual merit to say and communicate.