Yes, it’s annoying. But many sites have RSS feeds that they don’t advertise. For example, almost all sites based on Wordpress have an RSS feed that you can get to by appending ‘/feed/’ to the site’s URL. For example, if the site is hosted at ‘example.org’, ‘example.org/feed/’ will give you the RSS feed. Appending ‘comments/feed/’ instead will give you an RSS feed for the site’s comments.

And for podcasts that are listed on iTunes or SoundCloud, you can use http://getrssfeed.com/ to extract the URL to the RSS feed.

BTW, even Hacker News has an RSS feed, at https://news.ycombinator.com/rss. (If you’re on Android, I recommend using the Materialistic app instead, https://play.google.com/store/apps/details?id=io.github.hidr...)

For reading RSS feeds in general, I prefer rss2email (https://github.com/rss2email/rss2email) to normal RSS readers. You get each new post as an e-mail (HTML or plaintext, with support for digest mode).