I can't speak for the staff, but I know they really want to see original content, rather than every other piece of smut on the internet. Back on the old site, before this one came about, there were a few professional studios that had made arrangements to allow them to share their work.

I would say err on the side of caution and make content that contributes. If you're just dropping a bunch of gifs and calling it a day, you're probably going to get downvoted. But if you make a post that shares a gif or two, and talk about what you like about the actress/actor, you're probably more likely to end up with upvotes from the dPorn team.