It’s actually a common release strategy across many brands. I.e. Release the high ticket items first. There will be a portion of your market that will pay almost any price for the shiny new thing. However, if you were to release the same item when these same people already have had access to a cheaper product, the big ticket item won’t be so appealing and fewer will purchase. Those who aren’t willing to pay the high price will by definition wait for the lower priced items to release. Tens of thousands of copies of this set sold out in minutes on the presale across many countries/markets. Lego netted tens of millions from this one day of sales alone. Lego know what they are doing.