What is the algorithmic penalty applied to a Reddit ad that consistently receives a downvote ratio significantly exceeding the subreddit's average downvote ratio?

Reddit's algorithm penalizes ads with consistently high downvote ratios compared to the subreddit average through a reduction in ad delivery and an increase in cost per mille (CPM). The ad's Quality Score is significantly lowered, leading to decreased visibility and higher advertising costs. A low Quality Score indicates that the ad is not resonating with the target audience. Reduced ad delivery means the ad is shown to fewer users. Reddit's algorithm prioritizes ads that are positively received by the community, and an ad with a high downvote ratio signals that it is irrelevant, offensive, or low quality. Consequently, the ad's reach is significantly limited. The CPM, which is the cost an advertiser pays per thousand impressions, is increased. This is because Reddit charges more for ads that are less engaging or negatively perceived by users. This double penalty effectively makes it more expensive to run an unpopular ad and reduces its overall effectiveness. Consistently poor performance can even lead to the ad being automatically disapproved, preventing it from running at all. In addition to the reduced delivery and increased costs, the algorithm may also reduce the frequency with which that particular advertiser's ads are shown in that specific subreddit. Therefore negative feedback on Reddit translates to both financial and visibility penalties.