[orborde]

Efficiency.

If a driver has to spend 4 minutes of every hour doing stupid antics to get an order, and can earn $15/hour doing antics+delivering, then effectively $1/hour is going to pay for stupid antics, from Amazon's perspective.

Amazon would like to switch those 4 minutes from "doing stupid antics" to "doing deliveries" so that they can pay the same $15/hour but get a full hour of real work instead of only 56 minutes.

[orborde]

More concretely: Amazon's drivers (arguendo) don't care what they're getting paid $15/hour to do. If Amazon removes the incentive for antics, then it can pay 14/15 the per-delivery fee, and each driver can do 15/14 the deliveries and still make $15/hour.