> In biology, signals are traits, including structures and behaviours, that have evolved specifically because they change the behaviour of receivers in ways that benefit the signaller.
In other words, they are communication.
> When an alert bird deliberately gives a warning call to a stalking predator and the predator gives up the hunt, the sound is a signal.
Because warning calls are costly and difficult to fake? No, warning calls are faked all the time, to frighten other animals.
From https://en.wikipedia.org/wiki/Social_status :
> Social status defines being liked. Some writers have also referred to a socially valued role or category a person occupies as a "status" (e.g., gender, race, having a criminal conviction, etc.). Status is based in beliefs about who members of a society believe holds comparatively more or less social value.
> In a society, the relative honor and prestige accorded to individuals depends on how well an individual is perceived to match a society's goals and ideals (e.g., being pious in a religious society).
> a teacher may have a positive societal image (respect, prestige) which increases their status but may earn little money, which simultaneously decreases their status.
This all amounts to... strong support for exactly what I already said. Did you read these articles before citing them?
- Status signaling is the only way of impressing other people.
- Signaling is sending any message by any means. Signals that are difficult to fake are more effective than signals that aren't. But easy-to-fake signals are obviously still signals.
- Status is anything that impresses other people. Money, strength, talent, and character are all forms of status that are valued differently by different groups. If you're very strong, then you have high status among groups that respect strength -- as long as they know you're strong. Which is why you have to signal it.
You appear to have confused the concepts of "status signaling" and "conspicuous consumption".