In order for you to get site comments on Wealthy Affiliate you have to comment on someone else's post. So for every two comments you give you get one comment back. (Trust me when I say this algorithm works otherwise you would have a hard time getting comments on your site).
What comments will do for you is get you noticed by Google, once they see action taking place on your site they become interested. So get stuck in and build some credits.
A word of warning; make sure you write a decent comment relevant to the author's post. Just saying 'that is so good' doesn't cut it. Read their post carefully and make sure your comment is in line with their post.
They are not wanting feedback here, as in, don't tell them they are doing a great job and the site looks magnificent, that is site feedback. Recognise the difference?
If you are unsure, on the comment page you can click on 'view more instructions' and you will see this:
Now onto Site Comments...
What you have presented here Michael is nothing short of BRILLIANT...
There is no room for misunderstanding here and if all the people I hope will read this tutorial read EACH page properly, they will ALL be better off for the experience!
Thank you for taking the time to publish this!