I think when talking about big content creators from other platforms, you also should keep in mind what content they produce and who their fans are. Some big influencers probably have 99% followers under the age of 17-18, while I suppose 99% of the STEEM accounts belong to people 18 years or older.

So if such a star just comes to Steemit/Dtube/Dlive and expects the same results with little to no community interaction (watch your examples amount of meaningful comments f.e.), they will fail. And it is great that they do.