Over the last year, or there about, we’ve had Flattr links at the bottom of all posts on Digital Fanatics. The total yield of these is EUR0.52, or which one payment came from Thingiverse and the other from my account on Flattr.
The conclusion of this is that this site either targets the wrong audience, or that Flattr does not work. I kind of liked their idea, but for now, the link goes away.