If it's a new project, I wouldn't worry about the extra click until you start getting some comments (yeah I realize it's a bit circular, but true). My experience is that you will get comments from the aggreggators that the traffic came from, e.g. HN. And maybe Twitter and Facebook.
Most people aren't used to posting comments on websites anymore. But I do get a few comments on Reddit, and it has been worth it.
https://www.reddit.com/dev/api/
If it's a new project, I wouldn't worry about the extra click until you start getting some comments (yeah I realize it's a bit circular, but true). My experience is that you will get comments from the aggreggators that the traffic came from, e.g. HN. And maybe Twitter and Facebook.
Most people aren't used to posting comments on websites anymore. But I do get a few comments on Reddit, and it has been worth it.