I ran into the same issues. I had a niche (starwars) product I was advertising on the starwars subreddit during holidays which would pull in ~$1.5 per $1 spent

I ran into the same issues. I had a niche (starwars) product I was advertising on the starwars subreddit during holidays which would pull in ~$1.5 per $1 spent on Reddit (lifesize wookie cardboard cutout). After new changes the tactic operates at a loss so I opted to stop advertising on Reddit all together.