What is the type of advertising called in this statement Be one of the lucky ones Receive a free hat when you buy a matching shirt We did and look at us now?

The type of advertising in this statement is known as "promotional advertising" or "incentive advertising." It encourages consumers to make a purchase by offering a free item, in this case, a hat with the purchase of a matching shirt. The phrase "Be one of the lucky ones" adds a sense of exclusivity and urgency, appealing to the consumer's desire for a good deal and social proof with "We did and look at us now."