How is this possible? A key generator or are they simply toying with numbers somehow?
Key generators do not work (maybe 1 in a billion or something) but the only keys you could steal is an existing one, meaning someone has to buy it.
The spam is caused by different ports, which is how you see more than one server here.
Of course the results are empty, as long as the user does not connect to any server or install any add-on that posts to a site. Pretty easy to hide yourself that way.