DoorDash, Uber Eats, and Grubhub clip 25–40% off every order. On a $50K/month pizza store, that's $15K a month walking out the door before food cost.
Without your own ordering channel, you can't text a slow Tuesday promo, you can't win back a lapsed regular, and you can't measure what's actually driving repeat.
Coupon mailers, in-app boosts, and Yelp ads spend down with no attribution back to direct orders. Multi-location ops can't tell which stores are actually growing.