Add another: the various platforms talk to each other (or analyze driver movement) in order to manipulate order offerings in such a way as to discourage drivers from taking orders from more than one app at once. One app will wait until the other has confirmed an accepted order before deluging you with their own orders, all taking you in the opposite direction (which makes you late for one or more deliveries, giving cause to terminate your contract).
Source?
Pure anecdata. However, the change from the first two days I multi-apped and made almost 3 times my usual hourly rate, to the following weekend, when
>neither app would send me orders for up to half an hour
>as soon as one had assigned me and order, the other would start sending my multiple per minute
>all of these orders were either comically low-compensation (no tip), a 15-minute-plus drive away from the order I'd just accepted (to areas it had never sent me before), or both
was marked.