I wish somebody did a similar service for Pocket. I guess having a native client for reading files will never happen (been waiting for years..!). But I could also use an interface for reading articles while I'm online..
I wonder if Pinboard - the regular website - would work for this. I've never tried it, but since it's such a plain no-frills HTML page, there's a change it would look good on a Kindle. (And probably have good perf too - no oodles of JavaScript to execute)
https://www.instapaper.com/apps
https://david-smith.org/blog/2012/10/11/instapaper-on-the-ki...