For the record, these "order-ahead transactions" are what services like Just-Eat in the UK, and GrubHub in the US, do for takeaways. Here in the UK, Just-Eat charges 11% plus VAT, and they still have huge amounts of takeaways sign up for them, because when people like me think "I want takeaway", I go to Just-Eat's website. I see that GrubHub charges 13.5% on average.
I don't know whether that'll translate well to things other than takeaway, but Square obviously thinks it will.
I don't know whether that'll translate well to things other than takeaway, but Square obviously thinks it will.