Actually there is a hack. After buying a kindle, you just write to kindle support and say that you are getting ads and you are not aware why are you getting them. They usually would remove them for you. Worked for me though when I bought kindle.
http://www.catb.org/jargon/html/meaning-of-hack.html
It's not far off a hack. And not OP but personally I've got very few problems with getting one over on massive corporations like Amazon.
Likewise, businesses lose money on people who habitually return things. People who behave reasonably subsidize the "ingenious" minority. Generous warranty and return policies can only exist when most people behave reasonably.
This is actually a good description the behaviour of megacorps like Amazon. They are constantly looking for new ways to increase and consolidate market share, pushing or breaking the boundaries of anti-trust regulations, at the expense of the consumer.
I wouldn't advocate this sort of behaviour towards individuals or small businesses, only megacorps. Highly dubious that this would actually cause harm to the average person. If anything it would hasten the enshittification process, open the field up to competition, and be a net positive for society.
I am likely coming at this from an entirely different mindset to you. In my mind, the current economic structure implies that sufficiently large corporations are pitched in a battle against ordinary people.