Shameless plug: We created https://contentgems.com https://contentgems.com for this exact purpose. The ability to filter articles in a bunch of RSS feeds, and a

Shameless plug: We created https://contentgems.com https://contentgems.com for this exact purpose. The ability to filter articles in a bunch of RSS feeds, and any articles shared on Twitter based on keywords I specify. It's not trying to be smart, it just gives you what you're asking for. It's a mashup of Feedly, Google Alerts, Buffer, and IFTTT/Zapier.