A better question is, what % of web developers test their JS rendering on the array of browsers it's guaranteed to encounter, or consider what happens when very basic privacy tools are in use?

Those aren't relevant questions for this case, however. The page isn't failing to render without JS, it's failing to render without third party JS. For a group whose nominal message is bragging about their hax0r skills, it's pretty clumsy to build in a single point of fail dependency on code they don't control, then require their users to run it.