That’s not enough. I’ve been posting crypto/security links here https://www.cryptologie.net/links for 2 years and for almost every day and I've been unable to gain any traction. Of course I don't mind because I'm actually following the news and reading a lot of these links.
You are doing good. Now go and post some comments, get other accounts to post comments. Add a summary of the article, maybe use an application that generates an automated summary.
Create some long tail words and through those into the comments and auto summary on the page.
That should rank you a bit for some words in your group. Right now, Google is thinking you are just providing duplicate content.
Well tough luck. Sometimes you'll have to do stuff you don't want to do, and when it comes to running a community, being part of said community (or at least faking it until one exists) is one of those things.
