Why it worked
The post leverages the popularity of Ariana Grande and her merchandise, combined with the exclusivity of a "Target Exclusive" item, to create a sense of urgency and desirability. The mention of high demand and purchase limits further fuels this.
Product placement
Target: (a) it ACTS - it is the retailer where the product is sold, removing it would change where the product is purchased. Ariana Grande: (b) it merely APPEARS - her name and image are on the product being sold, removing it would not change what happens in the video. Katseye: (a) it ACTS - it is the name of the product being sold, removing it would change what the video is about.