I am kinda late but I was stalking your wall and this topic interested me.
When you say 1%, do you mean 1% annually or daily?
Annually in my opinion would be too little and daily would be too much.
And even then, people (especially the whales) would end up delegating a large fraction of their SP or Steem or SBD and that would allow them to accrue HUGE ROIs by doing nothing and it'll be a classic case of "Rich get richer"
Then again, that's just my opinion I guess....
I agree, maybe interest only accrues when active posts payout. A fair share I think.