Amazon is being sued for fraud in regard to its Prime Day discounts. They are raising the prices a couple days before the sale and then offer a discount. Lyft does this too with their offers. For example a 40% Turbo bonus begs the question of "40% of what?" What's the base rate they are adding the 40% to? With Lyft's upfront pricing they will lower the base rate and keep you under the state minimum. They don't use a rate card in their pricing.