According to an anonymous judge, the only way a wine won't be commended is if it makes someone "retch." Another said, "A commended wine is one that causes you less than pain." Wineries will also take awards they won for, say, a 2011 white and slap them on 2017 bottles of red. Or if they somehow failed to "win" anything at all, they'll add their own suspiciously similar-looking labels.
It's all a cheap marketing trick meant to shine up that Shiraz from Nebraska's fourth-finest winery, but it's more than consumers who are getting ripped off. The wineries have to pay for the stickers they put on the bottles, so it's in a competition's interests to hand out as many awards as possible. Drink what you want, but don't feel obligated to pay extra for the bottle with the fanciest stickers. After all, you're not gonna notice the difference between an 87-point bronze and a 91-point silver when you're pairing it with Kraft Mac and Cheese.