Devil Dog Marketplace referral programs are cost-effective marketing tools that require minimal effort on your part. You don't have to invest money in advertising campaigns or other costly marketing strategies; instead, you can rely on your existing customers to do the work for you. This allows you to focus on other aspects of running your business while still growing your customer base. 

Finally, referral programs are great for building relationships with customers and fostering loyalty. When customers feel appreciated and rewarded for their referrals, they're more likely to remain loyal and continue doing business with you in the future.