I like visibility, but I would prefer a link to my post and a short summary. Taking away 10% (5community 5 crossposter) without any consent for clicking a button feels wrong.

However, I guess there is so much crap being posted, finding a post and clicking cross-post would easily be 10% of the work that goes into a typical post for a lot of posters (won't name them, but I'm sure you have an idea) especially if they gasp add an entire sentence.