What? Signaling is not costly. It’s literally a display, a signal.
https://en.wikipedia.org/wiki/Signalling_(economics)
https://en.wikipedia.org/wiki/Costly_signaling_theory_in_evo...
An “in this house we believe” sign is signaling but if you live in a liberal neighborhood it’s extremely low cost by all measures.
https://en.wikipedia.org/wiki/Signalling_(economics)
https://en.wikipedia.org/wiki/Costly_signaling_theory_in_evo...