I do, and now they have Amazon Smile...which lets you donate a small commission to the charity of your choice.
This month, my charity is RWVA...Appleseed. Good basic marksmanship classes. Plus a bit of history.
Last month was Second Amendment Foundation.
If yer buying via Amazon (and I spend a hundred $ or so each month) ...why not? Costs you nothing and puts a bit of cash where you think it'll do some good.
just sign in using your Amazon logon and password and select your charity.