chances are very good that aliens are not using outmoded radio to communicate with each other
Yup—total waste of time.
No advanced alien race would be stupid enough to give away their location with radio signals.
Corollary 1: Humans are _not_ an advanced race—we are rock stupid!
Corollary 2: Humans love wasting money on insanely stupid projects like the one discussed here.
Corollary 3: Any advanced alien race that knew about us would hide themselves and observe us in ways we could not detect.
Corollary 4: They could be right in front of our noses and we wouldn’t know it.
(Example: We are right in front of ant’s noses but they have no clue about our nature, purpose, intent, or intelligence level—because they aren’t intelligent enough to figure out stuff that is right in front of them.)
We have a winner!