If there's a part that doesn't change, eg a footer or something, you can get a head start and have it figure out the rest by deduction with a spellchecker
You might manage to cobble together frequency analysis too, but that would be challenging. If the ciphertext is very small, or is marketspeak without any sense to its message, then that's going to fall flat. And all this assumes just ascii rather than say a (even limited) unicode font. These assholes could be doing that just to have curly quotes or whatever.