Recently Reddit advertiser IdoQL asked how they would be able to A/B test Reddit ads. It came as no surprise that Reddit doesn’t currently have a built in A/B testing platform for their advertisers as the site only recently appears to have taken selfserve advertising seriously.
Reddit staffer MyNameIzKhan replied that setting up your own A/B test experiment was possible, but unofficially. When an advertiser builds two ads with different creative but identical settings (spend, dates, and targeting) the Reddit Advertising platform will distribute their impressions as evenly as possible resulting in an almost A/B testing like environment.
We do not yet have true A/B testing. To test two different ads on the same subreddit you will need to set identical campaign parameters.
Our system will attempt to rotate these ads evenly throughout your campaigns length. – MyNameIzKhan, Reddit Advertising Staff