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Most SMTs will likely be worthless (or should be) just like crypto alts but hopefully some are able to come up with a good business model to make them actually worth something. Maybe through ad revenue sharing, or whatever it is. It needs to be more than just speculation.

Hm ... but most users aren't business men but just 'normal' bloggers - would you suggest STEEM to develop in a way that it won't be interesting anymore for people who just want to blog instead of inventing any genial business ideas? :)

It would still be interesting to normal bloggers but the valuation needs to come from somewhere. That is where people behind the scenes come into play. The normal bloggers don’t need to think about that. They can just blog and comment.

To be honest, currently, for me the future of STEEM looks like a journey into the unknown. There are many interesting ideas (like for example yours, like EIP, like my own one's, ...) but it's nearly impossible to evaluate their long term impact on the whole thing.
At this point I can only hope for the best, and wait and see.
At least I really appreciate that Steemit, Inc. is doing their very best to fix and develop things on many fronts. :)

The "people behind the scenes"... sounds deeper into centralisation. There may be external issues about turning this into a centralised chain.