But you don't know that.
There certainly were precedents: https://mathoverflow.net/questions/291158/proofs-shown-to-be...
Maybe for the author.
People also use social networks without expecting or requiring any net social "capital" benefit through "signalling".
Examples:
- keeping in touch with people (privately or publicly)
- inform others about something they may be interested in (without needing or requiring acknowledgement)
- lessening loneliness
- gathering or dispensing intel on a topic
- filling in time / looking for entertainment
I can readily think of many more reasons than the singlular one of signalling to heighten social status. I'm sure that occurs, but listing it as a primary reason cast the article immediately in disfavour for this reader.