How do your reviews of movies and games get on other websites you've specifically never went to?

A review of mine of the movie “Sister Act” is on Amazon. I purposefully left it there and have not gone to any other websites to leave a review for it. But I notice that some of my reviews I’ve left on Amazon are on other sites, such as toptenreviews and other sites I’ve never been to in my life.

I’m not exactly sure how crawling works, but is this how the other sites get my reviews?