From Letterboxd description:
In progress. I'm sorry if I missed a good one or included a bad one, I'm just trying to make a functional list for Prime subscribers who like horror. I included some "so bad they're good" movies because it seemed wrong to leave them out as they can be very entertaining. Also this list is US-based, so it may not be as helpful for those in other countries. Current as of October 2019 but Amazon is still messing around with their library and I'm trying to keep up.