I've made a big change to my RSS-to-ActivityPub converter: it no longer posts to the (Mastodon) federated timeline. This should prevent it from gunking that up with potential spam. It is also less "discoverable" but, fuck discoverability.
As always, you can convert any RSS feed into an ActivityPub compatible account here:
https://bots.tinysubversions.com/
I've attached a screenshot of my Mastodon lists for blogs, work stuff, and podcasts. It's kind of like Google Reader in your ActivityPub client!