I'm not suprised. This is what they do. When you think about it a lot of Amazon's business is partially subsidized by the tax payer. They pay less for the roads the drive on, they get huge tax breaks to open new wearhouses and headquarters and their workers' low wages are subsidized by welfare. The great deal you get and their ability to kill their competition is partially paid for by your taxes.
http://www.businessinsider.com/amazon-not-paying-taxes-trump...
https://www.politifact.com/truth-o-meter/statements/2018/may...