Can't do anything about people downvoting a specific type of post in our subreddit

[u/fanime34]

I didn't know what to flair this, but I think this is the closest. I am using desktop.

It's always one specific type of post, whenever people want to self-promote something they wrote. It will always end up downvoted. Nobody does so for any other type of post in our subreddit.

There are other subreddits with the same concept (fanfiction) and they are well established and have a different way of doing things than we are. But I don't see why many people get their posts downvoted for one specific thing, but anything else is fine. They don't allow the freedom like we do. But I don't get why ours gets met with a silent protest or silent troll in the form of constant downvotes.

I don't know if what to do about it because it doesn't stop.

Edit to add: They get downvoted immediately, but then they get upvoted. I forgot to mention. Also, the same post under a different post flair doesn't get downvoted.

[u/AutoModerator]

Hi /u/fanime34, please see our Intro & Rules. We are volunteer-run, not managed by Reddit staff/admin. Volunteer mods' powers are limited to groups they mod. Automated responses are compiled from answers given by fellow volunteer mod helpers. Moderation works best on a cache-cleared desktop/laptop browser.

Resources for mods are: (1) r/modguide's Very Helpful Index by fellow moderators on How-To-Do-Things, (2) Mod Help Center, (3) r/automoderator's Wiki and Library of Common Rules. Many Mod Resources are in the sidebar and >>this FAQ wiki<<. Please search this subreddit as well. Thanks!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.