The way I see it is more like a closed group. Not like the @artzone approach, more like the @sndbox and @make-a-whale approach. Only the very best (MINNOWS) content producers can be here, and we combine that with a trail.

Yes.

First, you open subscriptions for minnows to get a membership. Candidates should comply some requirements (A good reputation, a certain number of posts, etc.), then they are asked to create a special post for participating (Or perform a certain task) and then a group of highly respected steemians will select a few among them.

Yes.

An editor (or team) will be evaluating these posts (There won't be a lot of participants, so this task won't be hard) just to check everything is fine (It should because these minnows are the very best we could find).

Yes. All posts are manually reviewed and edited. Only posts from whitelisted authors are accepted.

How big or small this group can be, it depends on the delegation.

I had 70 posts/week on the account in mind when I wrote this.

The other way to do it is to ask all minnows who would like to be considered for the upvote, to post using a certain tag, and then have a team of people dedicated to select the best posts. But there would be A LOT of posts everyday to evaluate.

No.

But other than that you nailed it.