It's possible that the account was "reportmaxxed", i.e. some people mass-reported the account and triggered an automatic ban. Since the goal is to cause a fuss

It's possible that the account was "reportmaxxed", i.e. some people mass-reported the account and triggered an automatic ban. Since the goal is to cause a fuss and this ban has done that, it's not entirely unreasonable. It's also very possible that Elon just changed his mind and decided that nobody would really care if he banned ElonJet, because everyone has made up their minds about his Twitter policies anyway. I wouldn't put it past him for a second. I assume that the next reporter he talks to will jump at the chance to grill him on it, so we won't be wondering for very long.