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I'm not saying it's worth it. If you'd like to waste your money promoting bad content then that's the users fault. But what I am saying is just like boosting a Facebook post through its advertising platform this is the same method just on the blockchain. If used properly it can be effective with quality content. I get the concern that will be up to Steemit and the users to curate properly.

well, not everyone agree that steemit is a better platform than many other social platforms. So it depend on your perception, but you can't prove anything right or wrong based on your perception. Some people have found a better use of things while some don't like those things. This is how the world works. If everyone agree on something, there is no chance of development. Criticism makes things better, but saying something is completely wrong based on only your opinion isn't right either.