But why buy the book, for any amount? It was already available scanned to everyone for free online. The purchase literally didn’t further any of their stated goals, unless they thought it would give them rights to the IP.
Why would people come together to do that? Owning a copy of the book gives them no rights or possibilities to do anything they couldn’t before, except keeping it at someone’s house or do viewings of it in meatspace. Is the latter the idea?