I think your assessment of the strengths of steemit is accurate. But with everything, there are weaknesses or threats which challenge the longevity or sustainability of any service or platform - isn't it so? I am not an economist, or any sort of data analyst - I am trained in psychology and to a degree, language, so I am out of my depth on this matter. But as I am in the field, I witness that the main threat stems from the users themselves - where their motivation for using or abusing the platform, poses a threat to the overall enjyoment and therefore the value of the platform. But I may also be completely talking nonsense.
I liked your post very much. Thank you.
Yes that is true because there are many people who are just here to make a quick buck and run away.
They copy their posts from other places and try to get some cash going. That is a problem we as a community need to stop.