Proof of performance boost. Exact same location in my lawn boosted this mi-flora BLE sensor from -90 to -65dBm. It’s not a little antenna though.
Also worth pointing out that this is kind of illegal. Now that the device’s effective radiated power has changed the FCC certification is no longer valid.
In this case it’s probably ok as it is a long way from my property boundary and the signal drops off to the noise floor before it gets there.