It is not just Amazon
Many, many web sites have their desired action (usually you paying more) highlighted nice & big and the alternative to one side and smaller. It is easy to see how many are bamboozled by such tactics and have little recourse when they realise that hard earned cash has been syphoned from their credit card.
Then there are those that pre-tick the 'please send me spam' check boxes - they are not allowed to do this.
Even if you un-tick these boxes you often get spam, until you complain/unsubscribe - often having to do it more than once.
I am facing an issue with Direct Line car insurance. They have decided that my insurance will auto-renew. I never agreed to this, I have told them several times 'no'. If they take the cash I will tell the credit card company that it was not authorised and push a complaint of theft with the police.
Biting the hand that feeds IT
