How can this be done? Now I use fulltextrssfeed.com and WP robot, but I don't really like it, because fulltextrssfeed.com posts only like 5 articles when it was more than 50 in the original RSS feed. And all the plugins I tested (FeedWordPress, RSS poster, WP-o-matic, WP robot) couldn't post full articles from every feed I used.
The feeds themselves don't contain the full text of the articles.
What fulltextrssfeed.com does is fetching the URL of the feed entry and extracting the full text from there. This is what you have to do, too - if you want all the articles