>>101721086It's pretty useless outside of anime-related social activities like conventions, concerts, meet & greets, and/or social media selfies. Some people also just collect it for displays.
The people I know who regularly buy merch do it for collection purposes and profit. That stupid postcard that came with this set will probably sell for $200 itself easily. Sometimes it's just free or heavily discounted goods if you sell the handsigned off. There's almost always someone out there will buy a set of goods at slightly above retail because they missed it or feel regret. Even if you break even you will have your reward points/miles for the expense.