I don't, but some people do because they keep selling them. They got 5, and sold 3 the frist day.
I assume it could be because some people want it now vs waiting for shipping time, or maybe impulse. "I am standing here, kit in hand, I will take it" kinda thing. They may not have known it was out until they saw it in the store. Not everyone spends the amount of time online that some folks on this forum do. I am sure there are many reasons I cannot even think of.
I am never in that big if a hurry for a kit, I have enough to last me years and years as it is. I usually wait until model contests/swap meets to stock up or buy online, of from Hobby Lobby with a coupon or when they clearence them.