How does deliveroo make money when you get orders paying over £10 to do it?

One thing I don’t understand is how the rates for orders work. During quiet times, the normal rate for an order ranges from £2.90 up to £5 or £6. But during peak times, those rates skyrocket in my area. For example, during bad weather, there aren’t many people doing deliveries in a car—luckily, I do—so I guess the bikers head home. As a result, I get orders flying in that pay well over £9 or £10.

But how is Deliveroo making money from that? Is it during the quiet times when they pay lower rates that they make their profit? Because I’ve delivered multiple orders before where the rate I’m being paid is far higher than what the customer paid for the order.