$5 free donation to charitable organization of your choice when you shop!

Do any of you guys shop at smile.amazon.com?

You are shopping thru Amazon, but are donating .5% of your purchase to a charitable organization.  A win win for everyone.  

Now thru June 15th, shop at smile.amazon.com and they will donate $5 (instead of the usual .5%) to a charitable organization of your choice.

Why would you NOT do it?