Bluesky injecting RSS doesn't seem super unlikely to me. Because it's not really a platform, right. Every profile/account is it's own website. It's like everyone already has an "RSS" feed except for Bluesky/AT Protocol it is json based. It's unlikely but they could take in RSS. It doesn't go that much against their model. Although I don't think RSS feeds are usually signed. Bluesky feeds are signed. AT standing for Authenticated Transport. Plus from testing we know Bluesky don't derank posts with external links in it. That's the reason I think brands and people are going to it. Being able to use the audience you built somewhere else too. Bluesky isn't against external stuff.

Love the idea of split testing. To your point, I think it would require work on both the media host’s side and the app side to ensure good delivery of all A/B episode artwork and correlated downloads or plays related to the specific artwork file. But I like the idea.