I do not see how Steem is a scam, as a scam entails fooling people into handing over money for something worthless which they have been told is a sure-fire money-maker. That is not what Steemit is. Nobody has to invest money in Steemit, only invest their time in writing and curating posts. That the likelihood of your posts being popular enough to make you a 'whale' is small does not make this a scam, either. It just makes Steem like life: A few get significant monetary reward for their efforts, most get barely anything.