From my understanding an SMT would have free range to work this out in the way they see best suited for them.

There is some socio-economic factors to the game as well. Believe it or not, in Steem's white paper it predicts spam and abuse and it says that some of it is necessary to create the network effect.

Now that sounds counter intuitive, at least on the surface. But, when I think about the fact that no society has gotten ridden of negative behaviors, at least not entirely.

I will admit, I'm not aware of the sweet spot, but I'm convinced it does exist. Maybe if we cut down with spam/abuse to a third of what we have today. Maybe, that's optimal...