Interesting approach. It actually works! We are going to be seeing more and more of this kind of thing with the new decentralized blockchain apps. You can actually make money by performing small tasks. Its a very small amount, but there are several other apps which allow you to earn money. I will be evaluating them to see which are the best, and actually work by testing them. I will post the results and conclusions in future blog posts.
Here is the referral link for earn.com:
earn.com/fblauer/referral/?a=0dwgewz4v0rm5fmf