I think you are missing the joke. The crassness of plastering "as a millionaire" everywhere is a joke on its own. Sort of a parody on other tubers who throw in

I think you are missing the joke. The crassness of plastering "as a millionaire" everywhere is a joke on its own. Sort of a parody on other tubers who throw in similar catch phrases. In his early videos he talked about how being a "millionaire" isn't actually that uncommon. Now it is a meme to the viewers of the channel.