There is a lot of evidence that platforms which de-prioritize moderation have trouble attracting revenue and experience significant compliance costs. See: the sad story of Moot, who ran one of the most popular social websites in the world and ended up with absolutely nothing to show for it.
This looks more like a hobby to me than a business decision. Hobbies are fine as long as they don’t distract from the job, like Bezos buying Washington Post (he is a hands-off owner who spends very little time on it). But Musk is in two high-risk positions with Tesla and SpaceX. He worked over last Thanksgiving and sent a rather dramatic email about it. So I would be concerned about his ability to multi-task. He has already tried to run three businesses at once and he had to use Tesla to bail himself out of Solar City’s troubles.