Flattr does not work on smallish blogs 16 years ago
Great suggestion/comment (and example with xkcd). Have a look at the public Flattr wishlist which includes a bookmarklet to drag-n-drop for people to use -- https://flattr.com/wishlist
We'll try to contact as many people as possible (more straightforward with specific websites/pages, harder to achieve for say comments on a blog post, etc). Please keep the feedback and suggestions coming!