I remember a famous BrowserUk experiment where he set out to prove
he could gain lots of XP by posting nothing but utter rubbish.
Despite holding all ten worst nodes of the week his XP kept on flying upwards!
At the time, I felt Buk's experiment was redundant because another infamously lazy perl monk had already proved it.
Given the success of Buk's experiment,
perhaps that quote should be re-worked somehow by replacing "lazy" with
another word, such as your "operosity" suggestion, or perhaps "busy", "buzzing", "active", ...