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I think the similarity is mostly due to the fact that both Steemit, and WS work in a similar fashion regarding the mechanics.

I personally don't like the fact that they look so similar, but I don't think that is an indicator that WS will fail as a platform.  

If the demand is high enough for WS as a platform, it will see success. Right now, it's a bit early to tell, but I'm optimistic.