Reddit operates on an auction-based model, primarily charging per 1,000 impressions (CPM). Because it is less saturated than other major platforms, it often provides highly cost-effective traffic.
Cost Per Mille (CPM): Generally lower than Meta and LinkedIn, making it an excellent platform for scaling reach within specific niches.
Cost Per Click (CPC): Highly variable depending on the subreddit. Niche B2B or tech communities will cost more than broad entertainment subreddits.
Cost Per Acquisition (CPA): The ultimate success metric. CPA on Reddit is driven heavily by how well your ad copy resonates with the specific community.
Traditional ads often fail on Reddit, leading to wasted spend and negative brand sentiment. Achieving profitable results requires understanding the platform's unique culture, relentless A/B testing of ad copy, and proper conversion tracking.