While the gathering of aesthetic images never slowed down, the resulting dataset was only ever available from an specific url in the ratings API, making it fairly difficult to discover. To be honest, I was expecting by now, at least some models and other applications would have come out.
To help researchers and other interested parties discover this easier, I decided to upload the dataset file into huggingface. You can find it now here: https://huggingface.co/datasets/Haidra-Org/AI-Horde-Ratings
The benefit of this location is I can now also provide a README file along with it, explaining the columns in the parquet file, and providing other useful info, such as a huggingface demo.