You've to be careful with every subreddit's rules. No doubt they would hate hit-and-runners (I got that during my first visit because Reddit's a special creature) but be nice, helpful and only link your content when requested. Once you've established yourself even more, post your own content once in a while.
Recently I tried to enter a fairly inactive and small subreddit just to test the water, had my content downvoted. But on another subreddit I frequented more regularly, it was the totally opposite. Here's the image as a proof.
To embrace Reddit, you must love it as a community. Be more active, and you'd eventually see success with it. True story.