It's steel molds, most likely, so not all that surprising. In looking into thermal injection for caps and toy making possibilities, it's often mentioned that steel molds are a big cost. It's why companies like Lego store them in temperature-controlled environments.
What I'm wondering is how well SP would handle someone just forking out $$ to get new molds made with their own profile design? Of course, being at that point, willing to throw down tens of thousands like that is quite another story.