Did you look at my screenshot???...Just below that "blurb" you will see the next box down that says "Share this page", mine does not show any social media sites there to do it through because I do not use social media at all whatsoever, so I eliminated their links from showing on my computer, but yours should show links to Facebook, Instagram, Twitter, etc.
I am guessing that is how your supposed to do the "Support us for free" thingy Darwin was talking about...Through using your social media addresses when logging into Amazon.com