Never heard of AmazonSmile. Is it just regular Amazon but they donate a % to charity? Does it offer only a subset of their products? I'm looking for the catch but I can't see it.
It's just an overlay on Amazon.com that lets you designate a charity to receive a small percentage of your purchases as a donation. If you can buy it on Amazon, you can buy it on smile.amazon -- because they are the same site.
The catch is that you have to remember to type smile.amazon.com.