However, in some cases, the merchants underestimated the response or weren't prepared for the "Groupon Effect", which started a domino effect of bad press. For example, Posies Cafe in Denver offered $13 of food for $6 and ended up losing $8,000 dollars due to labor and materials costs. Crystal Nail Salon ended with so many Groupon customers and long wait times, it led to their Yelp ratings taking a nose dive. Groupon addressed many of these complaints and situations on their blog.