Re: Rate Limits, see
https://rachelbythebay.com/w/2024/05/27/feed/
but coming from an aggressively anticommercial world view. She collects evidence that real world feed readers don't implement RSS correctly
https://rachelbythebay.com/w/2026/02/23/readers/
Her problems are the problems of a polling-based protocol and really if she does not like the RSS protocol she should stop publishing it and stand up an ActivityPub or PubSubHubBub service instead.
A big part of the value of Google Reader and the ecosystem around it was that Google could poll your RSS feed once and everyone could read it... A huge win for the Rachels!