Fake Comments

When running an amazon affiliate site, should I post fake comments on the articles? Should I just let people organically comment? Should I allow comments at all?

A competitor ranking #1 for a given keyword has a 3k words article with a shitload of comments (i don't think they are fake) that sum 100k+ words on the page. So that made me wonder...

From My personal opinion.. Having comments is a good thing Because google considers it good.

Keep the comments moderated otherwise your comment section will be filled with spam.