SRS's stated goal is to highlight people on Reddit saying bad things (casual racism, stuff like that). Someone from the community finds a post somewhere on reddit they feel meets the criterion, and they post it there. Often immediately afterwards, the post, and the user who made it, begin losing karma at a rate that cannot be described as coincidental.
One of the rules in SRS is "don't touch the poop" - you're not supposed to participate in a thread that gets linked there. However, looking at the relation between post time on SRS, and karma over time, there's no other explanation for what happens to the scores of comments that get posted there.
Before you say "meh, racists, who cares?" - two problems. First, SRS's aegis has expanded to cover any criticism of the social justice movement, rather than actual hurtful comments. Second, what's happening is explicitly against the site rules regarding vote manipulation (vote brigading) - other subreddits who engaged in similar behavior had to institute rules that mandate either "no participation" links (a CSS hack that disables the voting buttons), or outright banning of intra-subreddit linking at the urging of site administration staff.