CyberSyn: a freeware WordPress plugin which pulls Full Text atrticles from RSS and Atom feeds
 

This plugin uses popular GPL Full-Text RSS library to pull full-text articles from the RSS feeds even if they don't provide it: https://wordpress.org/plugins/cybersyn/

A notice: the CyberSyn plugin is a very simplified (pared down) version of my CyberSEO plugin. So if you are planning to buy CyberSEO someday, you may want to play with CyberSyn first.

Duplicate content?

It's a content aggregator/curator like https://www.google.com/reader which was discontinued, but on your own site and working by your own rules. Actually almost all the most popular content on the Net is "duplicate". Look at the major tubes: the same videos everywhere. Or look at Google.com itself - no unique content at all: everything is taken from 3rd-party sites (Google news, Google videos, Google images etc). The CyberSyn plugin does absolutely the same thing as Google and many others.

Abutoblogging is gone, but content curation is not :2 cents: