To quote a couple of guys from 1959...
"The probability of success is difficult to estimate; but if we never search,
the chance of success is zero."
http://www.coseti.org/morris_0.htm
Plus an advanced enough ETI exploring the galaxy is not going to have issues
with resource spending on such a project that we might (but shouldn't).
When I think of the literally trillions wasted annually on transient things by our
species on this planet, a few dollars to signal ETI and/or search for their signals
is a rare noble goal.
