I can definitely see where your coming but I think that Steemit has the potential to be so much more than that. I used to think in the way that you are thinking now but after reading this post, I changed my mind.
https://steemit.com/steemit/@winstonwolfe/seriously-forget-about-the-money

Steemit is more a canvass than a scheme. I think it's important to view it as something that has potential but could also spiral crazily out of control and eventually turn out to be, yes, a ponzi scheme. But when it comes to something like this, call me weird. I'm an optimist. I believe in the potential of Steemit, and I'll keeping believing until the day I'm finally proven wrong.