It's not a new concept, in the UK, Quidco[0] has been doing this for a decade[1], the only difference here seems to be the paid membership system whereas quidco

It's not a new concept, in the UK, Quidco[0] has been doing this for a decade[1], the only difference here seems to be the paid membership system whereas quidco shave a fraction off for themselves. [0] http://www.quidco.com/ http://www.quidco.com/ [1] https://en.wikipedia.org/wiki/Quidco https://en.wikipedia.org/wiki/Quidco