Well written.
I usually think how to enhance crypto with the centralized bonuses we are used to (see my latest post).
But when starting to think about implementation you realize that the permissionless public blockchain is different.
Trustless since you trust no party.
But you are willing to trust some that might build sidechains.
I guess this was the SMT dream that crashed.

I think you are on to something.
Lets say there is a service (a centralized one) that allows you to participate in Hive with your facebook account.
What do you think?