Besides the matter of whether the cut they take is unreasonable or not, there's the matter of user experience.
Ordering on the phone is very easy. I don't need to make an account, don't need to get out my credit card, don't need to fill out my name, email address, etc. All the restaurants I order from seem to have systems that remember the address associated with incoming phone numbers, so after the first call I don't even need to tell them my address. If I order from a restaurant frequently enough, I often don't even need to tell them what I want, because they remember that too. It frequently goes "Hey, Big Joe's Pies, same as usual?" Yep. "Paying cash?" Yep. "Okay it'll be about 20 minutes." How can fidgeting around with an app compete with that?
Ordering on the phone is very easy. I don't need to make an account, don't need to get out my credit card, don't need to fill out my name, email address, etc. All the restaurants I order from seem to have systems that remember the address associated with incoming phone numbers, so after the first call I don't even need to tell them my address. If I order from a restaurant frequently enough, I often don't even need to tell them what I want, because they remember that too. It frequently goes "Hey, Big Joe's Pies, same as usual?" Yep. "Paying cash?" Yep. "Okay it'll be about 20 minutes." How can fidgeting around with an app compete with that?