Readability website says they are now paying writers for online content. See info: https://www.readability.com/publishers. Whether in a web browser, iPhone, or just about any mobile or tablet device. https://www.readability.com/publishers.
They also allow you to send articles to your kindle for free with this firefox add-on https://www.readability.com/addons
See their extra options:
I tried this free service and found it excellent. Articles come in by their titles, and all the busy adds are removed. Text is clean and appears to have removed unpleasant formatting problems usually associated with article downloads such as overly large text, etc.