alt Hacker NewsI created a new public group and posted three links from my blog to it in the space of 2 minutes without being charged https://www.youtube.com/watch?v=KtUvHF02lx4
Therefore "Facebook now charging to post more than 2 links a month" is false. It appears that this is some restriction applied to organic marketing.
> posted three links from my blog to it
I think the article says you can't post links from your FB page to external sites. What you're describing is the opposite: links from outside FB to an FB page. Of course they don't mind when you bring traffic to FB.