peakd gives you an option to cross-post.
It's "hidden" under the 3dots.
I like to cross-post certain things because the rewards automatically go to the person who wrote the original post (and allows fans to double vote).
So, if I cross-post your work, you get the rewards and extra exposure on another community.
I sometimes cross-post my own stuff just because it's an easy way to get content on "deepdives" and "freespeech" without going into the editor.