I have read all the comments here and there are many good suggestions.
Waiting 4-5 days is a very good suggestion as it takes time to check that the rules are being followed as @ project.hope says

As long as money is involved, there is always someone who will post the same post in several places and probably the same day.
I believe that if they post their article elsewhere after 4-5 days they do not deserve their upvote.

I like the idea of ​​@ achim03

I think it would be good for the authors who plan to write a post for steem only, that they write a link at the end of the post. Something like This is a project-hope steem only post. Check out what this means. This link would lead to a post, which has to be written (I could do that) explaining what this "steem only" is.

But if they just post a link about their post on Steem on other social platforms would be great for it is also about marketing themselves and SteemBlockchain.
I think it's important for further collaboration with STINC and the 200K SP that they delegate to upvote through @ project.hope and the team is to have strict rules.