This is exactly what went through my head as I read this post.

Apologies, I didn't see this earlier. This is my project.

Yep, I'm accessing the Lemmy and PieFed APIs to create custom RSS feeds. My motivation for creating this is that I prefer to interact with social aggregation websites in a low-volume way, so I let Upvote RSS surface the most popular posts for the communities I'm interested in. It adds posts to the generated RSS feeds with score thresholds, adding post content, comments, linked article contents/summaries, and more. You've linked to the public instance, but the project is meant to be used mainly self-hosted, so I've got a GitHub repo with more details on that.

Thanks for all the work you do to bring this place to life!

Thanks! PieFed seems to me to probably be the friendliest and most welcoming of these platforms. It's nice here.

Awesome, that's a great addition!