How is it definitely? It may hurt or may not. Credit card systems also charge a commission and yet every pizza place prefers to pay it rather than accept only cash, because of the benefits credit cards provide.
Justeat is an online pizza ordering service from Denmark which also requires pizza shops to sign up for it and pay a fairly large fee. This started out very well, but when it gained massive traction they ramped up the fees and pizza joints started complaining that it was killing them. Of course it was too late to opt out since all the consumers had gotten used to going to the website.
The fee started out at 10% and went up in steps up to 20%. At several points pizza shops tried banding together and staging mass "walkouts", but it never worked.
They should increase prices then. If customers like ordering through a voice assistant then make them pay for it. Any supplier for a pizza place can raise prices at any moment -- ingredients, rent, utilities. It's just business, nothing new. As long as it's not a monopoly it won't hurt businesses.
