As what I've read on their whitepaper, 2.6 page 12 it says that the yappadaappadoo application will become number 3 app store in the whole world. I slightly don't agree with this statement because what I think is that when this project will be launched, it will be the number 1 app store in the world, because the convenience of the app is greater than those popular app store right now.
just sayin.
I admire your positivity towards the yappadaappadoo project, anyway, this project will surely reach the top, but I think it would take much time, as we all know, the yappadaappadoo project isn't yet launched, and if ever it will be, it takes time to gain popularity since it is not yet well known in the society.
That would be awesome but I think number 3 would be much more realistic. Apple app store and Google play store are probably now starting to implement apps on PWA so, this will just be an additional competition.