https://steempeak.com/trending/cross-post
each cross-post will be put into one topic/tag
So if you're interested in seeing how they're being used.
Or for those who are wondering if there is anything that they consider "abuse" you now have a good tool for it.
You could also run a tool to see those who use cross-post and then later remove #cross-post
In any case let us know how you use the new option