I assumed it did not take off because people here are either lazy (the comments say the opposite), or it didn't work for them consistently enough or as promised, as some comments said.

I think Tim Ferris is a recurring background character; I mean, I've read all three of his four hour books, and his thoughts on various things have influenced mine, and I don't think I'm the only one. But I don't think anything that I heard of from only him was a life-changing thing that worked very well.

...or Tim Feriss is seen as low status because he's not an academic (or for some other reason), so nobody tried. Could be a hidden alternative.