By Luc Olinga Tesla’s billionaire CEO has a chance to expand his influence, but he can also give his critics new ammunition. It’s money time for Elon Musk. If summer is behind now, autumn is off to a flying start for the richest man in the world. The tech tycoon has important appointments at the end of September that could have a considerable impact on the empire he is building. These appointments can also affect the image of a revolutionary and visionary boss that he is building. These appointments relate to two fronts: the abrupt withdrawal of his offer to acquire the social network Twitter …