Ordered $54 dollars of groceries. Only $34 was delivered by Amazon fresh and the rest by Amazon prime. Not knowing my entire order hadn't been filled yet, I tipped the Amazon fresh driver $10 cash. Later, Amazon charged my credit card another $5. In essence the person got a %50 tip. Amazons resolution was to give me an invisible $10 promotional credit that only appears when items meet some impossible criteria. Needless to say, they ripped me off.