And clearly the signal is from a race intelligent enough to rationalise sending something and capable of concluding that any somewhat similar in intelligence species if searching would have huge piles of unimpressive data such that their signal, although very simple, would cause any receiver operator upon noticing the signal amidst all the usual stuff to exclaim " zifnat" which is our equivalent to "wow" and no doubt they would know that the "zifnat signal" would cause debate and in time further research and pursuit where at some point someone would narrow down possible source points and lobby to send a return signal.
And maybe thats what we see here
Alex