Here's an answer by /u/Elphinstone1842 https://www.reddit.com/r/AskHistorians/comments/91q0w6/the_existence_of_libertalia/

Here's the thread they're referring to https://www.reddit.com/r/AskHistorians/comments/7xyx7h/friday_freeforall_february_16_2018/dudkyqc/

That may be of use. Hopefully they'll pop in themselves