Did you mention passive income? Lets see, high profile Youtuber joins Steem. We have already seen few, biggest and most recent one being furiouspete. By making few videos to DTube he has gained a nice piece of Steem Power for himself. This Steem Power gives him power to allocate some of the daily reward pool to whoever he wishes until he sells them or the blockchain isn't running anymore. So no, making a one video to DTube gains you rewards for a long, long time. Longer than on Youtube even. And as we are in the early days, even few Steem could prove to be very valuable over time. So making a one video, which nets you few Steem that you power up, could net you a lot of money over time. Don't forget the curation rewards either.

Hopefully this eases your mind. So I don't see why not big names wouldn't join Steemit. The competition will only get fiercer, and the number of Steem earned/millions of subscribers smaller for introduction post. We already can see the trend. One by one the benefits are realized by individuals who then take action.

My rant is over.