Are you a burner? Or are you just talking to something you don’t fully understand?
The social karma points you speak of are insccurate. Maybe someone thinks that way, but not actual burners.
It truly is a gifting economy, one which you are giving for the sake of giving, without expectations. People work hard for the entire year to provide a gift, and giving that gift is enough of a return on its investment.
It is not a capitalist endeavor, as there is no expectation of return or profit motive.
It IS an unsustainable system that requires external inputs.