No success on 80m WSPR TX with the ferrite rod antenna

Even though I remained on 80m WSPR overnight, not a single spot of my 2.5W transmit bursts received. It works well on RX but must just be too weak to be copied. I shall try for longer but fear it will be unsuccessful.

The table shows the unique stations spotted. Note that many were spotted multiple times.

Stations spotted on
80m WSPR RX overnight
with the ferrite rod antenna