Tipping is not required and I don't do it, especially in areas with laws about guaranteed minimum wages for workers.

I wrote about this before but I've been using Empower app recently as an Uber competitor, it acts as a subscription for drivers where they pay 50 bucks a month to get on the platform and then keep any and all fees from riders, so it keeps the prices very low for riders while drivers make more money. Essentially Empower cuts out their middleman profit margin to act more like Costco making money on subscriptions alone rather than the price of goods.