Seems to me, a lot of people in modern society still excercise this ritual.
Perhaps the insulting was ritual in the sense that an airport check-in person asks if you packed your own bag today. They're listening to the tone of your reply rather than the words. Similarly, if the insulters of the successful hunter are truly envious then there will be a different tone to their insults. Then a problem is exposed. Note that this ritual isn't encouraging envy (which is a harmful emotion). Rather it is helping to expose any envy that may have arisen, in a safe manner.
The flipside is that some people try to arouse envy in others. In modern times by conspicuous consumption, bling, expensive shoes, super-yachts, bragging on social media, etc. Such people deserve to be mocked until they've updated their idea of success.
Yet we are morally obliged to differentiate between them and those who've made original contributions: artists, inventors, innovators, problem-solvers and so on. Our survival in the long term actually depends on the latter group. After all we shouldn't be aiming to thrive for an 'extraordinarily long period of time', but indefinitely, just as the Ju/’hoansi would no doubt have preferred to.
Are you sure that's not just checking to see if honest innocent victims might have been conned by a criminal?