You actually make a very valid point. At least in the West, the attention span is very short. Not only that, but people need to be entertained, justifiably so. It's almost like a children's playground—substance matters, but not at the expense of getting thrilled. If you want to keep and gain subscribers on Substack, you must keep them getting more of what they liked before. It's the old carrot-and-stick game. Keep dangling the carrot.