Any poor antenna can succeed as 'receiver only'. It succeeds (mostly but not only)by channeling out-spatially-- areas where noise may predominate for the (nominal) TX antenna--if you have enough detectable signal to start. Obviously of you attempted the same ability to spatially channel on the TX antenna, it would have that same advantage on receive. Much of today's man made interference seems to predominate at high angles, which is why monopoles (which have a suck out at high angles) often work well for noise mitigation. Even if you get a loop somewhat off the ground (at least a few feet) it will curtail some of the 'transmission line phase cancellation effect' AND start into a NVIS regime. IF the noise is high angle on receive, you can combine that and the TX antenna (on receive), phase them, and do a pretty good job of phasing out the noise. Not always, but often. Phasing up a couple of very small loops--inside -- is a RX good solution in an HOA environment--as long as marijuana grow lamps don't predominate as the noise source.