@Maria Gomez we've run some Reddit campaigns for several of our clients. It's definitely more of a branding / demand gen play, not a conversion channel.
As a result, would highly recommend avoiding the promotion of gated content or hard-sell CTAs. Keep it painpoint / challenge + solution related or, if you do promote content, make sure it's value-driven and educational.
Lastly, keep in mind the audience that uses Reddit and pair creative to that understanding. Make it fun, creative, witty, and avoid the straightforward B2B creative that can easily be overlooked.