Here in NYC metro, ebikes are seen just about every intersection, multiples of them passing by in the streets.
They operate 24/7, all weather, 30-60 miles per day, most of them are Grubhub, Doordash and other deliveries. They are ridden mostly with throttle operation only, very little pedaling, some carry spare battery on the bike for extended range, but most just charge the battery when return to their "home base" of operation.
I would say that 90% of them are cheap, Chinese, hub-driven ebikes that cost under $1500 with large battery capacity, like the Arrow 10 ebikes.
https://www.roadbikerider.com/nyc-arrow-e-bike-brand/
I know some couriers can make up to $200-$250 per day doing deliveries, usually on poor weather conditions when people don't want to be out shopping for themselves.

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