This helps a lot!
I'm meaning I'd like to apply this to some academic and scientific niches, so I have to stay correct about duplicate content: I'd like to improve the project further as it goes on and build some trust and reputation.
I'd like to use this method to create something like Alltop or Mathblogging and Scienceseeker.
Any suggestion to realize and (most important) monetize it?
If that's the case then I believe that you shouldn't automate your blogs with rss feeds. Since you're wanting to build trust and reputation you're going to want to go for unique high quality content over anything else. You could write your own content own make your own pictures and be sure to NOT spam on social media. Give your readers the impression that you are an expert in your field (you don't have to be you just want to make it look like you are). For that you could try to make a pen name or a persona. There are just so many things that you can do, but remember that it'll take quite a long time to build up that level of reputation. Don't give up and don't get discouraged. You have to stick with it.
For monetization you could always go with adsense or other ads. You could even try affiliate marketing or if you really want to put that extra WOW of authority you could make your own custom products like video courses or offer to make customized study guides for high school and college students. It's all about offering the best value to your market that will make you stand out from your competitors if you go that path.
