He needs/wants you to be thinking about those companies (or their stock) as often as possible. It's an attention economy, and he is a master at getting as much

He needs/wants you to be thinking about those companies (or their stock) as often as possible. It's an attention economy, and he is a master at getting as much of it as possible. Some percent of the people reminded of The Elon will also thus be reminded to buy some stock (esp. in an era when buying stock is just a smartphone app away). I'm not saying it makes sense, I'm just saying it probably works.