This is exactly the thing - Steemit makes donating so easy that people are far more likely to do it without being asked. I believe once people start to realize they could earn rewards from posting good content they will start to leave Facebook and Twitter in droves. It can't happen quickly enough. Even big names struggle to make much money from donating today, but even ordinary users could start to make a little income from content people like. What's more, such rewards remove the need for pesky adverts. This concept is truly awesome and revolutionary.