I like the idea behind Amazon Smile but the execution is a bit underwhelming. I've spent tens of thousands of dollars at Amazon since joining Amazon Prime, but I've only generated $98.66 in donations -- a fraction of a percent. That's worse than just rounding up the price to the nearest dollar. What's the point? I get that Amazon's retail profit margins are terrible, but if they're only going to donate a totally insignificant percentage of their revenue, they shouldn't get any credit for it. Apparently Amazon came to the same conclusion.
If you want to see how much your Amazon Smile account has contributed, there's a web page: https://smile.amazon.com/charity/my-impact