I noticed Sparkle_Twilight for a long time, when I was not a problem solver at all. I just randomly opened some "good problems" from a problem list, clicked the status button, switched to sort by code length, and bam, Sparkle_Twilight.

I was wondering how could a single unrated account pass so many problem, you can find this accound easily on the ranking of problemset and it's on top2. And I watched their submissions, wow, obviously crawled from others' code. All passed at once (except some CEs) with different styles even languages. So I confirmed that this is just a shit bot account hanging on the leaderboard.

So I want to know, why there is Sparkle_Twilight? Even if bots are allowed on Codeforces (of course there are other bots), but what's its original purpose? It's not a remote judge bot like vjudebot or luogubot, it only does exercises without positive feedback. Is it just to look good on the leaderboard?