when a customer wants to buy a product, they usually go straight to Amazon.com and enter what they’re looking for. But there’s also a large segment of customers who begin their search on google, and ends up at Amazon. Well guess what. When that type of search to purchase experience happens, Amazon has to pay google. Internally, Amazon thought that if they could force users to go straight to Amazon, offer a small but obviously less amount of money to charity from each customer than would have been paid to google, it would help kill customers going to google, save Amazon more money than paying google, and be good overall for the brand value of Amazon.

There is no way for a customer to go through the traditional shopping experience, and then during checkout decide they want to give a portion of their purchase to charity, because giving to charity isn't the point of the overall program. Amazon Smile was developed by the Traffic Optimization team, whose entire purpose is increasing efficiency and lowering costs of getting customers to Amazon. A team of Amazon employees whose sole purpose is doing good in the world doesn't exist, despite employees repeatedly asking for such a team to be built in pretty much every single all-hands meeting.

Literally everything the company does is about profits, and extended customer lifetime value. Everything. Even the charity programs are just designed to save Amazon money.