Looking for Reddit / Quora comments + upvotes

I'm currently seeking the assistance of someone who is knowledgeable and experienced in commenting on a specific niche. I need someone who can provide insightful comments on already-opened threads in this niche, and help rank those comments at the top.
In those comments, you will give like customer review of the product and don't need to have a hyperlink, just URL like this site.com or site (dot) com...
If you have the expertise and skills necessary to do this, please send me a private message. I can provide further details on what I'm looking for.