https://backfeed.app/
Backfeed – the memorable rss feed proxy
Backfeed proxies RSS feeds concatenated with historical content from archive.org
rss feedbackfeedmemorableproxy
https://indieweb.org/backfeed
backfeed - IndieWeb
Backfeed is the process of syndicating interactions on your POSSE copies back (AKA reverse syndicating) to your original posts.
backfeedindieweb