Did they even have the option not to go nuclear? From the sounds of their blog post, they would have spent the proper amount of time to do what they were being "asked" (threatened) to do, if they were even given time to do so. They said their preferred decision would have been to ask every NSFW dev if they complied with the payment processors they accept, but the time they were expected to implement all that was so short that they couldn't do that fairly.