When you provide someone with something of undeniable worth, they will view your offer as more valuable in their eyes. Free samples and limited-time offers make customers feel like they’re getting a great deal. Another benefit is that they are more likely to keep using your product once they have purchased it, due to the human tendency to attach a higher value to things that are already in one’s possession. Potential users, for instance, risk giving up a great resource once a free trial period is over. The phrases “30-day free trial,” “$20 free play for signing up,” and “Try it for 14 days” are all variations on the theme of “try before you buy.”