This still seems to suggest some up-front design though. How do you know that the piracy pricing is going to be a significant risk (as pointed out in 3) unless

This still seems to suggest some up-front design though. How do you know that the piracy pricing is going to be a significant risk (as pointed out in 3) unless you think through some of its' design? Why wouldn't the engineers then go into developing the Storm feature with this knowledge, so that they avoid making any decisions that might cause significant rework when it comes time to implement piracy? I can't see how they could assess the risk of the piracy feature without having thought it through and then choose not to take any of that thought into account when implementing the storm pricing feature.