I know we’ve talked about similar functions before. I’m still a fan of a “ReSteem with Comment” type feature that leaves the person sharing an opportunity to add additional commentary and thoughts if they choose, and gives a small 10-20% of the author rewards to the person sharing. It opens up a second level of curation and the capability of “evergreen” payouts and viral size payouts for authors!

I don’t see the need for the two different options you describe, I’d rather have one flexible implementation.
I think the system would be largely self policing as those who spam too many shares, particularly of low quality, will be quickly unfollowed, muted, etc.

With any of our proposed systems here, one question is how does it interpret a Resteem of a Resteem? If a new top level post is created by the person sharing, that post would be capable of being shared as well... so there needs to be some sort of data field that always links back to the original author and not just the next link up in the chain.