Your Game Review may not Count with Changes to Steam’s Review System
If you didn’t buy that game, your review might not count.
“We’re in the process of making a couple more small changes to Steam Customer Review system as we continue to fine-tune the relevance and accuracy of the overall review score for each product.
In September, we made some adjustments to how the review score was calculated for each product. You can read about those changes and the reasoning behind it here. We’re continuing with a few more changes in this direction to improve the relevance of the score by better reflecting the sentiment expressed by invested, paying customers.
With the changes we are making now, the review score (shown at the top of store pages and in various places throughout the store such as search results) will no longer include reviews by users that received the game for free, such as via a gift, or during a free weekend. Reviews can still be written by customers that obtained the game in any of these ways, but the review will not count toward the overall review score.”