I read a lot via Kindle though because it's an app I can't use the web clipper. I tried to use the web clipper in the web-based Kindle reading app though you can't copy it or send it to Napkin. So what's to do?
The answer is in the appropriate process. Once really shouldn't just clip from anywhere and send it to Napkin. One should summarize what they consider meaningful in their own words. And, if you highlight text in the Kindle reading app and create a note, the essence of what the selection means to you, the content of the note is picked up by the web clipper and can be sent directly to Napkin.
Sometimes you have to just keep looking for what works!