The sad cages scientific literature is kept in. Universities buy bulk access, that’s where those sites get their money, they don’t really care about anyone else.
Random note from the paper: anyone else notice how the programmer is assumed to be a man? 1963, sure, it's ok. But I was still a little amazed.
It's probably less assuming that a programmer is male, and more the fact that, at the time, "he" was well-accepted as a gender-neutral pronoun: