[pkaye]

What if you give a good tip first but then the delivery turns out late?

[sjjshzvuiajhz]

Complain though whatever feedback mechanism the app gives you. Same thing you’d do if the food didn’t show up at all.

On the other hand, what does the driver do if they go above and beyond to give you great service, but then you don’t tip?

[pkaye]

With prepayment of tip, we have no idea how the service will be. It would make sense to just roll it into the base cost.

[sjjshzvuiajhz]

The server doesn’t know whether you will follow through with a tip when they decide how well to serve you. The information asymmetry goes one way or the other.