Well shit, I just discovered that Munsey's (a website with a massive collection of pulp fiction available for free) has been offline for a good long while (2 years?)

Along with every other website I was using for Public Domain pulp fiction.

Apparently they got taken down for not being super strenuous with their copyright policy.

Aside from Project Gutenberg, what's out there? I want stuff from the 30s that didn't get it's copyright renewed (like The Spider Strikes)

@ajr seconding the Internet Archive. There's a number of similar projects, but I don't know how much pulp fiction they carry: https://ebookfriendly.com/free-public-domain-books-sources/