It is a very nice and very welcome feature. Unfortunately certain users (like /u/rickki6) circumvent this by creating their posts as text posts that only contain a link within the body. This allows them to spam their posts into both /s/QStorm and /s/QPatriots within seconds of each other and avoid the crossposting detection that would require they wait 10 minutes before crossposting a link to an additional sub. It results in all/new being filled with just their posts for nearly a whole page sometimes as they seem to set up all of their posts so they can just hit submit on all of them. They had half a dozen links yesterday, all duplicated immediately to both subs so nearly a dozen links, and all posted within just a few minutes. So it was something like within a span of 6 minutes they posted 6 links and duplicated each of them to two subs without being restricted by the crossposting spam prevention. @blumen4alles has been calling them out on this nigger behavior in the past few days. I didn't have a problem with what they were posting, but with how they posted them to get around spam prevention. It wasn't too bad for a while, but now they're going overboard and taking up entire sections of all/new with a dozen posts.