You know there's a difference. Holding two minutes of content ransom behind one minute of begging for likes is not the same as featuring a subscribe button on the end-card of a 50-minute long video. Unless you're used to aggressive advertisement tactics. Either way, you're losing track of your point. 1. Youtube isn't making them do it. 2. They don't need to do it. 3. It doesn't matter if they do it.