I found this on page 6 of YAPPADAPPADOO whitepaper and it is really interesting to know that YAPPADAPPADOO team promotes sharing of apps which is a good thing for people who have already purchased the applications. It will somehow create new friends and encourage everyone to be generous.
Users will love yappadappadoo, because they can access a universe of Progressive Web Applications. They can try out applications spontaneously and quickly. With Blockchain technology they can buy, use, and even transfer applications to other users.
try reading this article its a good read about the advantages of PWA to users and developers.