Lower your fees
If 85% of your Postmates orders are from repeat customers, then why use Postmates? If you provide online ordering to those same repeat customers on your own website, you can cut your fees in half.
Flipdish provides you with your very own website, so you no longer have to rely on Postmates to take orders online.
While Postmates was great for helping you find new customers, now that 85% of your business is from loyal customers, why not move them to your own website and save money?